Solve for x
x=-2
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1-x-2x=7
Combine x and x to get 2x.
1-3x=7
Combine -x and -2x to get -3x.
-3x=7-1
Subtract 1 from both sides.
-3x=6
Subtract 1 from 7 to get 6.
x=\frac{6}{-3}
Divide both sides by -3.
x=-2
Divide 6 by -3 to get -2.
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