91-5x=9x+21

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Solution for 91-5x=9x+21 equation:


Simplifying
91 + -5x = 9x + 21

Reorder the terms:
91 + -5x = 21 + 9x

Solving
91 + -5x = 21 + 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.
91 + -5x + -9x = 21 + 9x + -9x

Combine like terms: -5x + -9x = -14x
91 + -14x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
91 + -14x = 21 + 0
91 + -14x = 21

Add '-91' to each side of the equation.
91 + -91 + -14x = 21 + -91

Combine like terms: 91 + -91 = 0
0 + -14x = 21 + -91
-14x = 21 + -91

Combine like terms: 21 + -91 = -70
-14x = -70

Divide each side by '-14'.
x = 5

Simplifying
x = 5

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