9x+21+11x-1=90

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Solution for 9x+21+11x-1=90 equation:


Simplifying
9x + 21 + 11x + -1 = 90

Reorder the terms:
21 + -1 + 9x + 11x = 90

Combine like terms: 21 + -1 = 20
20 + 9x + 11x = 90

Combine like terms: 9x + 11x = 20x
20 + 20x = 90

Solving
20 + 20x = 90

Solving for variable 'x'.

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

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

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

Combine like terms: 90 + -20 = 70
20x = 70

Divide each side by '20'.
x = 3.5

Simplifying
x = 3.5

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