15-x=3(x+3)

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


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

Reorder the terms:
15 + -1x = 3(3 + x)
15 + -1x = (3 * 3 + x * 3)
15 + -1x = (9 + 3x)

Solving
15 + -1x = 9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
15 + -1x + -3x = 9 + 3x + -3x

Combine like terms: -1x + -3x = -4x
15 + -4x = 9 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + -4x = 9 + 0
15 + -4x = 9

Add '-15' to each side of the equation.
15 + -15 + -4x = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = 9 + -15
-4x = 9 + -15

Combine like terms: 9 + -15 = -6
-4x = -6

Divide each side by '-4'.
x = 1.5

Simplifying
x = 1.5

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