Three times a first number minus a second number equals negative forty The first number plus twice the second number equals negative forty

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asked Sep 2, 2021 169k views

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Vladimir Mitrovic · Answer 1 · 2021-09-06T22:37:05+0000

2x-y=-40
x+2y=-40
Multiply the second equation by 2
2x+4y=-80
Subtract
2x-y=-40
2x+4y=-80
-5y=40
Decide by -5
y=-8

To find y, plug it back into an equation
x+2y=-40
x+2(-8)=-40
x-16=-40
x=-24

Three times a first number minus a second number equals negative forty The first number plus twice the second number equals negative forty

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