Solve for a
a=4
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4a-3-\left(-a\right)=17
To find the opposite of 3-a, find the opposite of each term.
4a-3+a=17
The opposite of -a is a.
5a-3=17
Combine 4a and a to get 5a.
5a=17+3
Add 3 to both sides.
5a=20
Add 17 and 3 to get 20.
a=\frac{20}{5}
Divide both sides by 5.
a=4
Divide 20 by 5 to get 4.
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