Solve for a_2
a_{2}=\frac{7x}{5}
Solve for x
x=\frac{5a_{2}}{7}
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5a_{2}=7x
Swap sides so that all variable terms are on the left hand side.
\frac{5a_{2}}{5}=\frac{7x}{5}
Divide both sides by 5.
a_{2}=\frac{7x}{5}
Dividing by 5 undoes the multiplication by 5.
7x=5a_{2}
The equation is in standard form.
\frac{7x}{7}=\frac{5a_{2}}{7}
Divide both sides by 7.
x=\frac{5a_{2}}{7}
Dividing by 7 undoes the multiplication by 7.
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