Solve for u
u=\frac{2x}{3}+5
Solve for x
x=\frac{3\left(u-5\right)}{2}
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-3u=-15-2x
Subtract 2x from both sides.
-3u=-2x-15
The equation is in standard form.
\frac{-3u}{-3}=\frac{-2x-15}{-3}
Divide both sides by -3.
u=\frac{-2x-15}{-3}
Dividing by -3 undoes the multiplication by -3.
u=\frac{2x}{3}+5
Divide -15-2x by -3.
2x=-15+3u
Add 3u to both sides.
2x=3u-15
The equation is in standard form.
\frac{2x}{2}=\frac{3u-15}{2}
Divide both sides by 2.
x=\frac{3u-15}{2}
Dividing by 2 undoes the multiplication by 2.
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