-x-3+3x=-21

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Solution for -x-3+3x=-21 equation:


Simplifying
-1x + -3 + 3x = -21

Reorder the terms:
-3 + -1x + 3x = -21

Combine like terms: -1x + 3x = 2x
-3 + 2x = -21

Solving
-3 + 2x = -21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + 2x = -21 + 3

Combine like terms: -3 + 3 = 0
0 + 2x = -21 + 3
2x = -21 + 3

Combine like terms: -21 + 3 = -18
2x = -18

Divide each side by '2'.
x = -9

Simplifying
x = -9

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