3x+42=78

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Solution for 3x+42=78 equation: 


Simplifying
3x + 42 = 78

Reorder the terms:
42 + 3x = 78

Solving
42 + 3x = 78

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + 3x = 78 + -42

Combine like terms: 42 + -42 = 0
0 + 3x = 78 + -42
3x = 78 + -42

Combine like terms: 78 + -42 = 36
3x = 36

Divide each side by '3'.
x = 12

Simplifying
x = 12

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