Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$x=ab-a.$$

Answer

a=x/(b-1)

Solution


Factor out the common term \(a\).
\[x=a(b-1)\]
Divide both sides by \(b-1\).
\[\frac{x}{b-1}=a\]
Switch sides.
\[a=\frac{x}{b-1}\]
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