Solve for x
x=\frac{-x_{2}-15}{7}
Solve for x_2
x_{2}=-7x-15
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7x+15=-x_{2}
Subtract x_{2} from both sides. Anything subtracted from zero gives its negation.
7x=-x_{2}-15
Subtract 15 from both sides.
\frac{7x}{7}=\frac{-x_{2}-15}{7}
Divide both sides by 7.
x=\frac{-x_{2}-15}{7}
Dividing by 7 undoes the multiplication by 7.
x_{2}+15=-7x
Subtract 7x from both sides. Anything subtracted from zero gives its negation.
x_{2}=-7x-15
Subtract 15 from both sides.
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