91-(5x+13)=5(x+9)+x

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Solution for 91-(5x+13)=5(x+9)+x equation:


Simplifying
91 + -1(5x + 13) = 5(x + 9) + x

Reorder the terms:
91 + -1(13 + 5x) = 5(x + 9) + x
91 + (13 * -1 + 5x * -1) = 5(x + 9) + x
91 + (-13 + -5x) = 5(x + 9) + x

Combine like terms: 91 + -13 = 78
78 + -5x = 5(x + 9) + x

Reorder the terms:
78 + -5x = 5(9 + x) + x
78 + -5x = (9 * 5 + x * 5) + x
78 + -5x = (45 + 5x) + x

Combine like terms: 5x + x = 6x
78 + -5x = 45 + 6x

Solving
78 + -5x = 45 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
78 + -5x + -6x = 45 + 6x + -6x

Combine like terms: -5x + -6x = -11x
78 + -11x = 45 + 6x + -6x

Combine like terms: 6x + -6x = 0
78 + -11x = 45 + 0
78 + -11x = 45

Add '-78' to each side of the equation.
78 + -78 + -11x = 45 + -78

Combine like terms: 78 + -78 = 0
0 + -11x = 45 + -78
-11x = 45 + -78

Combine like terms: 45 + -78 = -33
-11x = -33

Divide each side by '-11'.
x = 3

Simplifying
x = 3

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