9(13-x)-4x=5(21-2x)+x

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Solution for 9(13-x)-4x=5(21-2x)+x equation:


Simplifying
9(13 + -1x) + -4x = 5(21 + -2x) + x
(13 * 9 + -1x * 9) + -4x = 5(21 + -2x) + x
(117 + -9x) + -4x = 5(21 + -2x) + x

Combine like terms: -9x + -4x = -13x
117 + -13x = 5(21 + -2x) + x
117 + -13x = (21 * 5 + -2x * 5) + x
117 + -13x = (105 + -10x) + x

Combine like terms: -10x + x = -9x
117 + -13x = 105 + -9x

Solving
117 + -13x = 105 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
117 + -13x + 9x = 105 + -9x + 9x

Combine like terms: -13x + 9x = -4x
117 + -4x = 105 + -9x + 9x

Combine like terms: -9x + 9x = 0
117 + -4x = 105 + 0
117 + -4x = 105

Add '-117' to each side of the equation.
117 + -117 + -4x = 105 + -117

Combine like terms: 117 + -117 = 0
0 + -4x = 105 + -117
-4x = 105 + -117

Combine like terms: 105 + -117 = -12
-4x = -12

Divide each side by '-4'.
x = 3

Simplifying
x = 3

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