Solve for a
a=1
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3a+4=-1+a+7
Subtract 1 from 0 to get -1.
3a+4=6+a
Add -1 and 7 to get 6.
3a+4-a=6
Subtract a from both sides.
2a+4=6
Combine 3a and -a to get 2a.
2a=6-4
Subtract 4 from both sides.
2a=2
Subtract 4 from 6 to get 2.
a=\frac{2}{2}
Divide both sides by 2.
a=1
Divide 2 by 2 to get 1.
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