Solve for x
x=150-x_{1}
Solve for x_1
x_{1}=150-x
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5x=750-5x_{1}
Subtract 5x_{1} from both sides.
\frac{5x}{5}=\frac{750-5x_{1}}{5}
Divide both sides by 5.
x=\frac{750-5x_{1}}{5}
Dividing by 5 undoes the multiplication by 5.
x=150-x_{1}
Divide 750-5x_{1} by 5.
5x_{1}=750-5x
Subtract 5x from both sides.
\frac{5x_{1}}{5}=\frac{750-5x}{5}
Divide both sides by 5.
x_{1}=\frac{750-5x}{5}
Dividing by 5 undoes the multiplication by 5.
x_{1}=150-x
Divide 750-5x by 5.
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