Solve for x
x=-\frac{7x_{13}}{6}
Solve for x_13
x_{13}=-\frac{6x}{7}
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7x_{13}+2x+4x=0
Add 4x to both sides.
7x_{13}+6x=0
Combine 2x and 4x to get 6x.
6x=-7x_{13}
Subtract 7x_{13} from both sides. Anything subtracted from zero gives its negation.
\frac{6x}{6}=-\frac{7x_{13}}{6}
Divide both sides by 6.
x=-\frac{7x_{13}}{6}
Dividing by 6 undoes the multiplication by 6.
7x_{13}=-4x-2x
Subtract 2x from both sides.
7x_{13}=-6x
Combine -4x and -2x to get -6x.
\frac{7x_{13}}{7}=-\frac{6x}{7}
Divide both sides by 7.
x_{13}=-\frac{6x}{7}
Dividing by 7 undoes the multiplication by 7.
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