15=3(6+x)

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Solution for 15=3(6+x) equation: 


Simplifying
15 = 3(6 + x)
15 = (6 * 3 + x * 3)
15 = (18 + 3x)

Solving
15 = 18 + 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 + -3x = 18 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + -3x = 18 + 0
15 + -3x = 18

Add '-15' to each side of the equation.
15 + -15 + -3x = 18 + -15

Combine like terms: 15 + -15 = 0
0 + -3x = 18 + -15
-3x = 18 + -15

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

Divide each side by '-3'.
x = -1

Simplifying
x = -1

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