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3 years ago

What is x and y using substitution

Mathematics

2 answers:

klasskru [66]3 years ago

6 0

X-5y= 36
2x+y=-16 from the first line, x=5y+36, then substitue for x below

2(5y+36) + y =-16 so 10y+72+y=-16, so 11y+72=-16, so 11y=-88 or y=-8
y=-8, put this in your equation and you get x+40=36 or x=-4,
so your answer is x=-4 and y=-8

Bad White [126]3 years ago

5 0

X-5y=36
x+y=-26

y=-26-x

x-5(-26-x)=36
x+130+x=36
2x+130=36
2x=36-130
2x=-94
x=47

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