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-x+5=4+6x-20
Combine -4x and 3x to get -x.
-x+5=-16+6x
Subtract 20 from 4 to get -16.
-x+5-6x=-16
Subtract 6x from both sides.
-7x+5=-16
Combine -x and -6x to get -7x.
-7x=-16-5
Subtract 5 from both sides.
-7x=-21
Subtract 5 from -16 to get -21.
x=\frac{-21}{-7}
Divide both sides by -7.
x=3
Divide -21 by -7 to get 3.