Solve for y
y=42-3x
Solve for x
x=-\frac{y}{3}+14
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-\frac{y}{3}=x-14
Subtract 14 from both sides.
-y=3x-42
Multiply both sides of the equation by 3.
\frac{-y}{-1}=\frac{3x-42}{-1}
Divide both sides by -1.
y=\frac{3x-42}{-1}
Dividing by -1 undoes the multiplication by -1.
y=42-3x
Divide -42+3x by -1.
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