78=129-3x

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Solution for 78=129-3x equation:


Simplifying
78 = 129 + -3x

Solving
78 = 129 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
78 + 3x = 129 + -3x + 3x

Combine like terms: -3x + 3x = 0
78 + 3x = 129 + 0
78 + 3x = 129

Add '-78' to each side of the equation.
78 + -78 + 3x = 129 + -78

Combine like terms: 78 + -78 = 0
0 + 3x = 129 + -78
3x = 129 + -78

Combine like terms: 129 + -78 = 51
3x = 51

Divide each side by '3'.
x = 17

Simplifying
x = 17

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