Solve for x
x=\frac{213-4y}{7}
Solve for y
y=\frac{213-7x}{4}
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7x=213-4y
Subtract 4y from both sides.
\frac{7x}{7}=\frac{213-4y}{7}
Divide both sides by 7.
x=\frac{213-4y}{7}
Dividing by 7 undoes the multiplication by 7.
4y=213-7x
Subtract 7x from both sides.
\frac{4y}{4}=\frac{213-7x}{4}
Divide both sides by 4.
y=\frac{213-7x}{4}
Dividing by 4 undoes the multiplication by 4.
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