(18x+13)-(15x-12)=x+9

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Solution for (18x+13)-(15x-12)=x+9 equation:


Simplifying
(18x + 13) + -1(15x + -12) = x + 9

Reorder the terms:
(13 + 18x) + -1(15x + -12) = x + 9

Remove parenthesis around (13 + 18x)
13 + 18x + -1(15x + -12) = x + 9

Reorder the terms:
13 + 18x + -1(-12 + 15x) = x + 9
13 + 18x + (-12 * -1 + 15x * -1) = x + 9
13 + 18x + (12 + -15x) = x + 9

Reorder the terms:
13 + 12 + 18x + -15x = x + 9

Combine like terms: 13 + 12 = 25
25 + 18x + -15x = x + 9

Combine like terms: 18x + -15x = 3x
25 + 3x = x + 9

Reorder the terms:
25 + 3x = 9 + x

Solving
25 + 3x = 9 + 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.
25 + 3x + -1x = 9 + x + -1x

Combine like terms: 3x + -1x = 2x
25 + 2x = 9 + x + -1x

Combine like terms: x + -1x = 0
25 + 2x = 9 + 0
25 + 2x = 9

Add '-25' to each side of the equation.
25 + -25 + 2x = 9 + -25

Combine like terms: 25 + -25 = 0
0 + 2x = 9 + -25
2x = 9 + -25

Combine like terms: 9 + -25 = -16
2x = -16

Divide each side by '2'.
x = -8

Simplifying
x = -8

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