90-3x+15=4x

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Solution for 90-3x+15=4x equation:


Simplifying
90 + -3x + 15 = 4x

Reorder the terms:
90 + 15 + -3x = 4x

Combine like terms: 90 + 15 = 105
105 + -3x = 4x

Solving
105 + -3x = 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.
105 + -3x + -4x = 4x + -4x

Combine like terms: -3x + -4x = -7x
105 + -7x = 4x + -4x

Combine like terms: 4x + -4x = 0
105 + -7x = 0

Add '-105' to each side of the equation.
105 + -105 + -7x = 0 + -105

Combine like terms: 105 + -105 = 0
0 + -7x = 0 + -105
-7x = 0 + -105

Combine like terms: 0 + -105 = -105
-7x = -105

Divide each side by '-7'.
x = 15

Simplifying
x = 15

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