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3 years ago

Y=-1,X+2y=9 solve by substitution show all work

Mathematics

1 answer:

Inga [223]3 years ago

4 0

Answer:

x = 11

Step-by-step explanation:

Substitute y = -1 into the equation.

x+2y = 9

; x+2(-1) = 9

x+(-2) = 9

x-2 = 9

x = 9+2

x = 11

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Step-by-step explanation:

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Brackets

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So lets multiply first,

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Next, we subtract:

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