15=(x-1)+9

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Solution for 15=(x-1)+9 equation:


Simplifying
15 = (x + -1) + 9

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

Remove parenthesis around (-1 + x)
15 = -1 + x + 9

Reorder the terms:
15 = -1 + 9 + x

Combine like terms: -1 + 9 = 8
15 = 8 + x

Solving
15 = 8 + 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.
15 + -1x = 8 + x + -1x

Combine like terms: x + -1x = 0
15 + -1x = 8 + 0
15 + -1x = 8

Add '-15' to each side of the equation.
15 + -15 + -1x = 8 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 8 + -15
-1x = 8 + -15

Combine like terms: 8 + -15 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7

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