90-7x=20x-15

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Solution for 90-7x=20x-15 equation:


Simplifying
90 + -7x = 20x + -15

Reorder the terms:
90 + -7x = -15 + 20x

Solving
90 + -7x = -15 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
90 + -7x + -20x = -15 + 20x + -20x

Combine like terms: -7x + -20x = -27x
90 + -27x = -15 + 20x + -20x

Combine like terms: 20x + -20x = 0
90 + -27x = -15 + 0
90 + -27x = -15

Add '-90' to each side of the equation.
90 + -90 + -27x = -15 + -90

Combine like terms: 90 + -90 = 0
0 + -27x = -15 + -90
-27x = -15 + -90

Combine like terms: -15 + -90 = -105
-27x = -105

Divide each side by '-27'.
x = 3.888888889

Simplifying
x = 3.888888889

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