9x+21=20-1

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Solution for 9x+21=20-1 equation:


Simplifying
9x + 21 = 20 + -1

Reorder the terms:
21 + 9x = 20 + -1

Combine like terms: 20 + -1 = 19
21 + 9x = 19

Solving
21 + 9x = 19

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 9x = 19 + -21

Combine like terms: 21 + -21 = 0
0 + 9x = 19 + -21
9x = 19 + -21

Combine like terms: 19 + -21 = -2
9x = -2

Divide each side by '9'.
x = -0.2222222222

Simplifying
x = -0.2222222222

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