-3x-9=7+x

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Solution for -3x-9=7+x equation:


Simplifying
-3x + -9 = 7 + x

Reorder the terms:
-9 + -3x = 7 + x

Solving
-9 + -3x = 7 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-9 + -3x + -1x = 7 + x + -1x

Combine like terms: -3x + -1x = -4x
-9 + -4x = 7 + x + -1x

Combine like terms: x + -1x = 0
-9 + -4x = 7 + 0
-9 + -4x = 7

Add '9' to each side of the equation.
-9 + 9 + -4x = 7 + 9

Combine like terms: -9 + 9 = 0
0 + -4x = 7 + 9
-4x = 7 + 9

Combine like terms: 7 + 9 = 16
-4x = 16

Divide each side by '-4'.
x = -4

Simplifying
x = -4

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