(2x+9)-(x-9)=9

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


Simplifying
(2x + 9) + -1(x + -9) = 9

Reorder the terms:
(9 + 2x) + -1(x + -9) = 9

Remove parenthesis around (9 + 2x)
9 + 2x + -1(x + -9) = 9

Reorder the terms:
9 + 2x + -1(-9 + x) = 9
9 + 2x + (-9 * -1 + x * -1) = 9
9 + 2x + (9 + -1x) = 9

Reorder the terms:
9 + 9 + 2x + -1x = 9

Combine like terms: 9 + 9 = 18
18 + 2x + -1x = 9

Combine like terms: 2x + -1x = 1x
18 + 1x = 9

Solving
18 + 1x = 9

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 1x = 9 + -18

Combine like terms: 18 + -18 = 0
0 + 1x = 9 + -18
1x = 9 + -18

Combine like terms: 9 + -18 = -9
1x = -9

Divide each side by '1'.
x = -9

Simplifying
x = -9

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