91-3x=4x+7

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Solution for 91-3x=4x+7 equation:


Simplifying
91 + -3x = 4x + 7

Reorder the terms:
91 + -3x = 7 + 4x

Solving
91 + -3x = 7 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
91 + -3x + -4x = 7 + 4x + -4x

Combine like terms: -3x + -4x = -7x
91 + -7x = 7 + 4x + -4x

Combine like terms: 4x + -4x = 0
91 + -7x = 7 + 0
91 + -7x = 7

Add '-91' to each side of the equation.
91 + -91 + -7x = 7 + -91

Combine like terms: 91 + -91 = 0
0 + -7x = 7 + -91
-7x = 7 + -91

Combine like terms: 7 + -91 = -84
-7x = -84

Divide each side by '-7'.
x = 12

Simplifying
x = 12

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