Solve for n
n=-\frac{5y}{2}+7
Solve for y
y=\frac{14-2n}{5}
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10n=70-25y
Subtract 25y from both sides.
\frac{10n}{10}=\frac{70-25y}{10}
Divide both sides by 10.
n=\frac{70-25y}{10}
Dividing by 10 undoes the multiplication by 10.
n=-\frac{5y}{2}+7
Divide 70-25y by 10.
25y=70-10n
Subtract 10n from both sides.
\frac{25y}{25}=\frac{70-10n}{25}
Divide both sides by 25.
y=\frac{70-10n}{25}
Dividing by 25 undoes the multiplication by 25.
y=\frac{14-2n}{5}
Divide 70-10n by 25.
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