15x-42=9x+12

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Solution for 15x-42=9x+12 equation:


Simplifying
15x + -42 = 9x + 12

Reorder the terms:
-42 + 15x = 9x + 12

Reorder the terms:
-42 + 15x = 12 + 9x

Solving
-42 + 15x = 12 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
-42 + 15x + -9x = 12 + 9x + -9x

Combine like terms: 15x + -9x = 6x
-42 + 6x = 12 + 9x + -9x

Combine like terms: 9x + -9x = 0
-42 + 6x = 12 + 0
-42 + 6x = 12

Add '42' to each side of the equation.
-42 + 42 + 6x = 12 + 42

Combine like terms: -42 + 42 = 0
0 + 6x = 12 + 42
6x = 12 + 42

Combine like terms: 12 + 42 = 54
6x = 54

Divide each side by '6'.
x = 9

Simplifying
x = 9

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