4x+121=12x-7

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Solution for 4x+121=12x-7 equation:


Simplifying
4x + 121 = 12x + -7

Reorder the terms:
121 + 4x = 12x + -7

Reorder the terms:
121 + 4x = -7 + 12x

Solving
121 + 4x = -7 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
121 + 4x + -12x = -7 + 12x + -12x

Combine like terms: 4x + -12x = -8x
121 + -8x = -7 + 12x + -12x

Combine like terms: 12x + -12x = 0
121 + -8x = -7 + 0
121 + -8x = -7

Add '-121' to each side of the equation.
121 + -121 + -8x = -7 + -121

Combine like terms: 121 + -121 = 0
0 + -8x = -7 + -121
-8x = -7 + -121

Combine like terms: -7 + -121 = -128
-8x = -128

Divide each side by '-8'.
x = 16

Simplifying
x = 16

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