x-90=3x

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Solution for x-90=3x equation:


Simplifying
x + -90 = 3x

Reorder the terms:
-90 + x = 3x

Solving
-90 + x = 3x

Solving for variable 'x'.

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

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

Combine like terms: x + -3x = -2x
-90 + -2x = 3x + -3x

Combine like terms: 3x + -3x = 0
-90 + -2x = 0

Add '90' to each side of the equation.
-90 + 90 + -2x = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -2x = 0 + 90
-2x = 0 + 90

Combine like terms: 0 + 90 = 90
-2x = 90

Divide each side by '-2'.
x = -45

Simplifying
x = -45

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