x+15=2(9+x)

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Solution for x+15=2(9+x) equation:


Simplifying
x + 15 = 2(9 + x)

Reorder the terms:
15 + x = 2(9 + x)
15 + x = (9 * 2 + x * 2)
15 + x = (18 + 2x)

Solving
15 + x = 18 + 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 + x + -2x = 18 + 2x + -2x

Combine like terms: x + -2x = -1x
15 + -1x = 18 + 2x + -2x

Combine like terms: 2x + -2x = 0
15 + -1x = 18 + 0
15 + -1x = 18

Add '-15' to each side of the equation.
15 + -15 + -1x = 18 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 18 + -15
-1x = 18 + -15

Combine like terms: 18 + -15 = 3
-1x = 3

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

Simplifying
x = -3

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