90-3x=42x+15

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Solution for 90-3x=42x+15 equation:


Simplifying
90 + -3x = 42x + 15

Reorder the terms:
90 + -3x = 15 + 42x

Solving
90 + -3x = 15 + 42x

Solving for variable 'x'.

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

Add '-42x' to each side of the equation.
90 + -3x + -42x = 15 + 42x + -42x

Combine like terms: -3x + -42x = -45x
90 + -45x = 15 + 42x + -42x

Combine like terms: 42x + -42x = 0
90 + -45x = 15 + 0
90 + -45x = 15

Add '-90' to each side of the equation.
90 + -90 + -45x = 15 + -90

Combine like terms: 90 + -90 = 0
0 + -45x = 15 + -90
-45x = 15 + -90

Combine like terms: 15 + -90 = -75
-45x = -75

Divide each side by '-45'.
x = 1.666666667

Simplifying
x = 1.666666667

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