15=3x-x-7

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Solution for 15=3x-x-7 equation:


Simplifying
15 = 3x + -1x + -7

Reorder the terms:
15 = -7 + 3x + -1x

Combine like terms: 3x + -1x = 2x
15 = -7 + 2x

Solving
15 = -7 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
15 + -2x = -7 + 2x + -2x

Combine like terms: 2x + -2x = 0
15 + -2x = -7 + 0
15 + -2x = -7

Add '-15' to each side of the equation.
15 + -15 + -2x = -7 + -15

Combine like terms: 15 + -15 = 0
0 + -2x = -7 + -15
-2x = -7 + -15

Combine like terms: -7 + -15 = -22
-2x = -22

Divide each side by '-2'.
x = 11

Simplifying
x = 11

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