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2 years ago

7

-3×+7y=5 -8×+14y=-10 By elimination

1 answer:

dimaraw [331]2 years ago

5 0

-3x+7y=5 (x2) -> -6x+14y=10

-6x+14y=10
-8x+14y=-10
——————— -
2x=20
x=20/20
x=1

Susbstitute x=1,

-8x+14y=-10
-8(1)+14y=-10
-8+14y=-10
14y=-10+8
14y=-2
y=-2/14
y=-1/7

I hope it helps

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