Solve for b
b=a-10
Solve for a
a=b+10
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-b=10-a
Subtract a from both sides.
\frac{-b}{-1}=\frac{10-a}{-1}
Divide both sides by -1.
b=\frac{10-a}{-1}
Dividing by -1 undoes the multiplication by -1.
b=a-10
Divide 10-a by -1.
a=10+b
Add b to both sides.
Examples
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Matrix
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Limits
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