x-y=4simultaneous linear equations
1. x-y=4simultaneous linear equations
Langkah-langkah :
x-y=4
y=0
x-y=4
x-0=4
x=4
________
x-y=4
x=0
x-y=4
0-y=4
-y=4-0
-y=4
y=-4
________
Jawaban:
(x,y)=(4,-4)
2. Linear Equations (Persamaan Linear) 1.-2(3x-4)=4(2x+5) 2.3(3y+4)=2(2y+1) 3.2y-1,3=2,8
1).
[tex] - 2(3x - 4) = 4(2x + 5) \\ - 6x + 8 = 8x + 20 \\ - 6x - 8x = 20 - 8 \\ - 14x = 12 \\ - x = \frac{12}{14} \\ - x = \frac{6}{7} \\ x = - \frac{6}{7} [/tex]
2).
[tex]3(3y + 4) = 2(2y + 1) \\ 9y + 12 = 4y + 2 \\ 9y - 4y = 2 - 12 \\ 5y = - 10 \\ y = - 2[/tex]
3).
[tex]2y - 1.3 = 2.8 \\ 2y = 2.8 + 1.3 \\ 2y = 4.1 \\ y = \frac{4.1}{2} \\ y = 2.05[/tex]
semoga membantu
3. Solve the following linear different equations
Jawaban:
Penjelasan dengan langkah-langkah:
check it bro!!!!!!
4. find the solution to the system of linear equations x+y=6 dan 2x-y=0
Jawaban:
x+y=6
2x-y=0
_____+
3x =6
x =6/3
x =2
x+y=6
2+y=6
y=6-2
y=4
hp {(x,y)}={(2,4)}
5. solver the following equations5(1-x)=4(10+x)
Jawaban:
5-5x = 40+4x
-5x-4x = 40 - 5
-9x = 35
x = 35 / (-9)
= -3,888...
Penjelasan:
Semoga bermanfaat.
6. Use the substitution method to solve the following pairs of simultaneous linear equations a.) 5 x + 2 y = - 1 x - 3 y = -7
~SPLDV
5x + 2y = -1 .......... 1)
x - 3y = -7 → x = 3y - 7 ...... 2)
Substitute The sec . Eq to The First Eq :
5x + 2y = -1
15y - 35 + 2y = -1
17y = 34
y = 2
With the same way , substitute the Value of 'y' to the sec . eq :
so we get ...
x = 3y - 7
x = -1
SC = {-1 , 2}
7. Mengapa slope Anggaran sama dengan slope kurva indeverent
Karena sama-sama memiliki hubungan yang berbanding terbalik sehingga kurvanya dimulai dari kiri atas ke kanan bawah.
8. solver equations 9-5(2x-1)=6
Jawaban:
[tex]9 -(10x - 5) = 6 \\ 9 - 10x + 5 = 6 \\ 14 - 10x = 6 \\ 10x = 14 - 6 \\ 10x = 8 \\ x = \frac{8}{10} = \frac{4}{5} \\ x = 0,8[/tex]
9. solve the linear equations in one variable bellow! a.2x - 25 = x + 4
2x - 25 = x + 4
2x -x = 25 + 4
x = 292x - 25 = x + 4
2x = x + 4 + 25
2x = x + 29
2x - x = 29
x = 29
10. [tex]\frac{1}{4}a[/tex] = 5, solve that equations!
1/4 . a = 5
4 . 1/4 . a = 5 . 4
a = 20
Mapel : Matematika
Kelas : 7
Materi : Bab 6 - Persamaan dan Pertidaksamaan Satu Variabel
Kata Kunci :
Kode Soal : 2
Kode Kategorisasi : 7.2.6
11. Find the solution of the following linear equations system --> x−7y=−11 and 5x+2y=−18 * A. x=−4, y=1 B. x=4, y=1 C. x=−4, y=-1 D. x=4, y=-1
Persamaan1
x - 7y = - 11
x = - 11 + 7y
Persamaan2
5x + 2y = - 18
SubstitusiPersamaan1kePersamaan2
5x + 2y = - 18
5 ( - 11 + 7y ) + 2y = - 18
- 55 + 35y + 2y = - 18
37y = 37
y = 1
SubstitusiNilaiykePersamaan1
x = - 11 + 7y
x = - 11 + 7 ( 1 )
x = - 11 + 7
x = - 4
Hp = { - 4 , 1 }
12. arti slope nol dan slope tak terhingga
yayayayayayayayayayayaya emang
13. passes through (1/3, 4) and has no slope
Penjelasan dengan langkah-langkah:
equation of line
y - 4 = 0(x- ⅓)
y = 4
14. [tex]\frac{1}{4}a[/tex] = 5, solve the equations!
a = 5 x 4 = 20 jawabannya
15. Pada Regresi linear sederhana diperoleh persamaan: y=0.2+2.3X1+e, nilai slope berapa? a. 0.2 b. 1 c. 2.3 d. 0
Jawaban:
b. 1
maaf kalau salah kak
16. Find the solution of the following linear equations system: 2x+3y=20 and7x+2y=53 *
2x+3y= 20.......(1)
7x+2y= 53.......(2)
we multiply (1) by 2 and (2) by 3,
4x+6y= 40.......(1)
21x+6y= 159......(2)
we substract (1) and (2)
4x-21x= 40-159
-17x= -119
x= 7
we substitute x= 7 to (1)
4(7)+6y= 40
28+6y= 40
6y= 40-28
6y= 12
y= 2
so, the solution is:
x= 7
y= 2
17. Use the substitution method to solve the following pairs of simultaneous linear equations A)5X + 2y = -1 X - 3y = -7
~SPLDV
5x + 2y = -1 .......... 1)
x - 3y = -7 → x = 3y - 7 ...... 2)
Substitute The sec . Eq to The First Eq :
5x + 2y = -1
15y - 35 + 2y = -1
17y = 34
y = 2
With the same way , substitute the Value of 'y' to the sec . eq :
so we get ...
x = 3y - 7
x = -1
SC = {-1 , 2}
18. solve the following equations.1-4 (2x+3)=5 (x-2)-3 (x-1)
Jawab:
x = [tex]- \frac{2}{5}[/tex]
Penjelasan dengan langkah-langkah:
1 - 4(2x + 3) = 5(x - 2) - 3(x - 1)
1 - 8x - 12 = 5x - 10 - 3x + 3
-8x - 11 = 5x - 3x - 10 + 3
-8x - 11 = 2x - 7
2x + 8x = -11 + 7
10x = -4
x = [tex]\frac{-4}{10}[/tex]
x = [tex]- \frac{2}{5}[/tex]
[tex]1 - 8x - 12 = 5x - 10 - 3x + 3 \\ - 8x - 5x + 3x = - 10 + 3 - 1 + 12 \\ - 10x = 4 \\ x = - \frac{4}{10} = - \frac{2}{5} [/tex]
19. Use the substitution method to solve the following pairs of simultaneous linear equations 3 x + 7 y = 4 2 x + y = - 1
2x + y = -1
y = -1-2x
3x + 7y = 4
3x + 7(-1-2x)=4
3x-7-14x = 4
-11x = 11
x = -1
2x + y =-1
-2 + y = -1
y = 1
x = -1 ; y=1
20. solve the linear equations in one variable 4(3 + 2×) = 9( × - 4)
4(3 + 2x) = 9(x - 4)
12 + 8x = 9x - 36
12 + 36 = 9x - 8x
48 = x
x = 48
4(3+2x) = 9(x-4) 12 + 8x = 9x-36 8x -9x = 12-36 -x = -24 X = -24/-1 X = 24 Maaf klo salah: v
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