Below, explain why we are allowed the "substitute in" x - 3 for y in the top equation. Why is this useful for finding our first solution? x + y = 11 y = x - 3

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asked Jun 17, 2022 109k views

11 votes

Below, explain why we are allowed the

"substitute in" x - 3 for y in the top equation.
Why is this useful for finding our first solution?
x + y = 11
y = x - 3

Mathematics
high-school

Mohamed Yakout asked

by Mohamed Yakout

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Answer:

because in the bottom eqution it shows us x-3=y therefor we could re-write the top equation as x+x-3=11

Nanpakal answered Jun 22, 2022

by Nanpakal

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