Solve for x
x=\frac{13-7y}{4}
Solve for y
y=\frac{13-4x}{7}
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4x=13-7y
Subtract 7y from both sides.
\frac{4x}{4}=\frac{13-7y}{4}
Divide both sides by 4.
x=\frac{13-7y}{4}
Dividing by 4 undoes the multiplication by 4.
7y=13-4x
Subtract 4x from both sides.
\frac{7y}{7}=\frac{13-4x}{7}
Divide both sides by 7.
y=\frac{13-4x}{7}
Dividing by 7 undoes the multiplication by 7.
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