Solve for x
x=15-y
Solve for y
y=15-x
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6x=90-6y
Subtract 6y from both sides.
\frac{6x}{6}=\frac{90-6y}{6}
Divide both sides by 6.
x=\frac{90-6y}{6}
Dividing by 6 undoes the multiplication by 6.
x=15-y
Divide 90-6y by 6.
6y=90-6x
Subtract 6x from both sides.
\frac{6y}{6}=\frac{90-6x}{6}
Divide both sides by 6.
y=\frac{90-6x}{6}
Dividing by 6 undoes the multiplication by 6.
y=15-x
Divide 90-6x by 6.
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