90=-4x

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Solution for 90=-4x equation:


Simplifying
90 = -4x

Solving
90 = -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.
90 + 4x = -4x + 4x

Combine like terms: -4x + 4x = 0
90 + 4x = 0

Add '-90' to each side of the equation.
90 + -90 + 4x = 0 + -90

Combine like terms: 90 + -90 = 0
0 + 4x = 0 + -90
4x = 0 + -90

Combine like terms: 0 + -90 = -90
4x = -90

Divide each side by '4'.
x = -22.5

Simplifying
x = -22.5

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