x-21x-90=0

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Solution for x-21x-90=0 equation:


Simplifying
x + -21x + -90 = 0

Reorder the terms:
-90 + x + -21x = 0

Combine like terms: x + -21x = -20x
-90 + -20x = 0

Solving
-90 + -20x = 0

Solving for variable 'x'.

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

Add '90' to each side of the equation.
-90 + 90 + -20x = 0 + 90

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

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

Divide each side by '-20'.
x = -4.5

Simplifying
x = -4.5

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