78+5x=3x+120

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Solution for 78+5x=3x+120 equation:


Simplifying
78 + 5x = 3x + 120

Reorder the terms:
78 + 5x = 120 + 3x

Solving
78 + 5x = 120 + 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 + 5x + -3x = 120 + 3x + -3x

Combine like terms: 5x + -3x = 2x
78 + 2x = 120 + 3x + -3x

Combine like terms: 3x + -3x = 0
78 + 2x = 120 + 0
78 + 2x = 120

Add '-78' to each side of the equation.
78 + -78 + 2x = 120 + -78

Combine like terms: 78 + -78 = 0
0 + 2x = 120 + -78
2x = 120 + -78

Combine like terms: 120 + -78 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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