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3 years ago

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Solve by substitution x-y=12 x+y=18

1 answer:

slamgirl [31]3 years ago

3 0

X = y + 12. You then substitute or plug in that from the first equation into the second equation. You get (y+12)+y=18, then you simplify to get your y value. In this case y = 3. The you can plug your y value into either equation. (x+3=18) or (x-3=12) or (x=3+12) either way you get x=15 and y=3.

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3 years ago

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Vanyuwa [196]

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Step-by-step explanation:

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see the attached figure

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