Solve for x
x=y-5
Solve for y
y=x+5
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-3x=15-3y
Subtract 3y from both sides.
\frac{-3x}{-3}=\frac{15-3y}{-3}
Divide both sides by -3.
x=\frac{15-3y}{-3}
Dividing by -3 undoes the multiplication by -3.
x=y-5
Divide 15-3y by -3.
3y=15+3x
Add 3x to both sides.
3y=3x+15
The equation is in standard form.
\frac{3y}{3}=\frac{3x+15}{3}
Divide both sides by 3.
y=\frac{3x+15}{3}
Dividing by 3 undoes the multiplication by 3.
y=x+5
Divide 15+3x by 3.
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