Solve for x
x=3\left(x_{2}-3\right)
Solve for x_2
x_{2}=\frac{x+9}{3}
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x+7=3x_{2}-2
Swap sides so that all variable terms are on the left hand side.
x=3x_{2}-2-7
Subtract 7 from both sides.
x=3x_{2}-9
Subtract 7 from -2 to get -9.
3x_{2}=x+7+2
Add 2 to both sides.
3x_{2}=x+9
Add 7 and 2 to get 9.
\frac{3x_{2}}{3}=\frac{x+9}{3}
Divide both sides by 3.
x_{2}=\frac{x+9}{3}
Dividing by 3 undoes the multiplication by 3.
x_{2}=\frac{x}{3}+3
Divide x+9 by 3.
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