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3 years ago

Solve by elimination

Mathematics

2 answers:

inna [77]3 years ago

4 0

2x - 2y = -4
-3x -3y = 0
_____________________
-1x - 5y = -4

Serggg [28]3 years ago

4 0

2x-2y=-4
Multiply eq.by 3
6x-6y=-12
-3x-3y=0
Multiply eq.by 2
-6x-6y=0
from both new eq.
6x-6y=-12
-6x-6y=0
So adding both eq. We get
-12y=-12
So y=1
From eq.1
2x-2y=-4
2x-2(1)=-4
2x-2=-4
2x=-4+2
2x=-2
x=-1
so x=-1 and y=1

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