90-(x+15)=4x

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Solution for 90-(x+15)=4x equation:


Simplifying
90 + -1(x + 15) = 4x

Reorder the terms:
90 + -1(15 + x) = 4x
90 + (15 * -1 + x * -1) = 4x
90 + (-15 + -1x) = 4x

Combine like terms: 90 + -15 = 75
75 + -1x = 4x

Solving
75 + -1x = 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
75 + -1x + -4x = 4x + -4x

Combine like terms: -1x + -4x = -5x
75 + -5x = 4x + -4x

Combine like terms: 4x + -4x = 0
75 + -5x = 0

Add '-75' to each side of the equation.
75 + -75 + -5x = 0 + -75

Combine like terms: 75 + -75 = 0
0 + -5x = 0 + -75
-5x = 0 + -75

Combine like terms: 0 + -75 = -75
-5x = -75

Divide each side by '-5'.
x = 15

Simplifying
x = 15

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