Solve for θ
\theta =\frac{u-30}{7}
Solve for u
u=7\theta +30
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7\theta +30=u
Swap sides so that all variable terms are on the left hand side.
7\theta =u-30
Subtract 30 from both sides.
\frac{7\theta }{7}=\frac{u-30}{7}
Divide both sides by 7.
\theta =\frac{u-30}{7}
Dividing by 7 undoes the multiplication by 7.
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