3x-15=12x-90

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Solution for 3x-15=12x-90 equation:


Simplifying
3x + -15 = 12x + -90

Reorder the terms:
-15 + 3x = 12x + -90

Reorder the terms:
-15 + 3x = -90 + 12x

Solving
-15 + 3x = -90 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
-15 + 3x + -12x = -90 + 12x + -12x

Combine like terms: 3x + -12x = -9x
-15 + -9x = -90 + 12x + -12x

Combine like terms: 12x + -12x = 0
-15 + -9x = -90 + 0
-15 + -9x = -90

Add '15' to each side of the equation.
-15 + 15 + -9x = -90 + 15

Combine like terms: -15 + 15 = 0
0 + -9x = -90 + 15
-9x = -90 + 15

Combine like terms: -90 + 15 = -75
-9x = -75

Divide each side by '-9'.
x = 8.333333333

Simplifying
x = 8.333333333

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