Solve for x
x=\frac{3\left(y-7\right)}{4}
Solve for y
y=\frac{4x}{3}+7
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-4x=21-3y
Subtract 3y from both sides.
\frac{-4x}{-4}=\frac{21-3y}{-4}
Divide both sides by -4.
x=\frac{21-3y}{-4}
Dividing by -4 undoes the multiplication by -4.
x=\frac{3y-21}{4}
Divide 21-3y by -4.
3y=21+4x
Add 4x to both sides.
3y=4x+21
The equation is in standard form.
\frac{3y}{3}=\frac{4x+21}{3}
Divide both sides by 3.
y=\frac{4x+21}{3}
Dividing by 3 undoes the multiplication by 3.
y=\frac{4x}{3}+7
Divide 21+4x by 3.
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