129=4x+7x-3

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Solution for 129=4x+7x-3 equation:


Simplifying
129 = 4x + 7x + -3

Reorder the terms:
129 = -3 + 4x + 7x

Combine like terms: 4x + 7x = 11x
129 = -3 + 11x

Solving
129 = -3 + 11x

Solving for variable 'x'.

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

Add '-11x' to each side of the equation.
129 + -11x = -3 + 11x + -11x

Combine like terms: 11x + -11x = 0
129 + -11x = -3 + 0
129 + -11x = -3

Add '-129' to each side of the equation.
129 + -129 + -11x = -3 + -129

Combine like terms: 129 + -129 = 0
0 + -11x = -3 + -129
-11x = -3 + -129

Combine like terms: -3 + -129 = -132
-11x = -132

Divide each side by '-11'.
x = 12

Simplifying
x = 12

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