-91-7x=7x+21

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Solution for -91-7x=7x+21 equation:


Simplifying
-91 + -7x = 7x + 21

Reorder the terms:
-91 + -7x = 21 + 7x

Solving
-91 + -7x = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-91 + -7x + -7x = 21 + 7x + -7x

Combine like terms: -7x + -7x = -14x
-91 + -14x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 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 = 112
-14x = 112

Divide each side by '-14'.
x = -8

Simplifying
x = -8

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