9-4x-15+12x=42

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Solution for 9-4x-15+12x=42 equation:


Simplifying
9 + -4x + -15 + 12x = 42

Reorder the terms:
9 + -15 + -4x + 12x = 42

Combine like terms: 9 + -15 = -6
-6 + -4x + 12x = 42

Combine like terms: -4x + 12x = 8x
-6 + 8x = 42

Solving
-6 + 8x = 42

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 8x = 42 + 6

Combine like terms: -6 + 6 = 0
0 + 8x = 42 + 6
8x = 42 + 6

Combine like terms: 42 + 6 = 48
8x = 48

Divide each side by '8'.
x = 6

Simplifying
x = 6

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