3x-42+12x=18

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Solution for 3x-42+12x=18 equation:


Simplifying
3x + -42 + 12x = 18

Reorder the terms:
-42 + 3x + 12x = 18

Combine like terms: 3x + 12x = 15x
-42 + 15x = 18

Solving
-42 + 15x = 18

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 + 15x = 18 + 42

Combine like terms: -42 + 42 = 0
0 + 15x = 18 + 42
15x = 18 + 42

Combine like terms: 18 + 42 = 60
15x = 60

Divide each side by '15'.
x = 4

Simplifying
x = 4

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