15=x-3(x+1)

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


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

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

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

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

Solving
15 = -3 + -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 = -3 + -2x + 2x

Combine like terms: -2x + 2x = 0
15 + 2x = -3 + 0
15 + 2x = -3

Add '-15' to each side of the equation.
15 + -15 + 2x = -3 + -15

Combine like terms: 15 + -15 = 0
0 + 2x = -3 + -15
2x = -3 + -15

Combine like terms: -3 + -15 = -18
2x = -18

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

Simplifying
x = -9

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