3(x-1)-15=x

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Solution for 3(x-1)-15=x equation:


Simplifying
3(x + -1) + -15 = x

Reorder the terms:
3(-1 + x) + -15 = x
(-1 * 3 + x * 3) + -15 = x
(-3 + 3x) + -15 = x

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

Combine like terms: -3 + -15 = -18
-18 + 3x = x

Solving
-18 + 3x = 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.
-18 + 3x + -1x = x + -1x

Combine like terms: 3x + -1x = 2x
-18 + 2x = x + -1x

Combine like terms: x + -1x = 0
-18 + 2x = 0

Add '18' to each side of the equation.
-18 + 18 + 2x = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 2x = 0 + 18
2x = 0 + 18

Combine like terms: 0 + 18 = 18
2x = 18

Divide each side by '2'.
x = 9

Simplifying
x = 9

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