Question

1. 2x + y = 4
X - y = -1

2. 3x - 2y = 10
4x - 3y = 15

TOLONGDIJAWAB!!

Answer 1

Verified answer

Nomor 1
2x+y=4
y=4-2x

x-y=-1
x-(4-2x)=-1
3x=3
x=1
y=4-2x=4-2(1)=2

nomor 2
3x-2y=10. dikali 3
4x-3y=15. dikali 2

9x-6y=30
8x-6y=30
-------------- -
x=0

3x-2y=10
3(0)-2y=10
-2y=10
y=-5

Answer 2

1) ↓↓↓↓

2x + y = 4
x - y = -1
—————— (-)
x = 3

2x + y = 4
2(3) + y = 4
6 + y = 4
y = 4 -6
y = -2

HP = { x & y = 3 & -2 }

2) ↓↓↓↓

3x - 2y = 10....×3
4x - 3y = 15....×2

9x - 6y = 30
8x - 6y = 30
——————— (-)
x = 0

3x - 2y = 10
3(0) - 2y = 10
-2y = 10
y = 10/-2
y = -5

HP = { x & y = 0 & -5 }

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