Solve for a
a=\frac{2n+51}{7}
Solve for n
n=\frac{7a-51}{2}
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7a=2n+16+35
Add 35 to both sides.
7a=2n+51
Add 16 and 35 to get 51.
\frac{7a}{7}=\frac{2n+51}{7}
Divide both sides by 7.
a=\frac{2n+51}{7}
Dividing by 7 undoes the multiplication by 7.
2n+16=7a-35
Swap sides so that all variable terms are on the left hand side.
2n=7a-35-16
Subtract 16 from both sides.
2n=7a-51
Subtract 16 from -35 to get -51.
\frac{2n}{2}=\frac{7a-51}{2}
Divide both sides by 2.
n=\frac{7a-51}{2}
Dividing by 2 undoes the multiplication by 2.
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