What is 4x+y=7 when y=x-3?

1 Answer
Alicia
Dec 5, 2017

x=2, y=-1

Explanation:

You can substitute your equation beginning with y into the first equation, to get 4x+(x-3)=7 .
Simplify:
4x+x-3=7
5x=10
And solve so
x=2.
Substitute into y=x-3
y=(2)-3=-1

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