21-1=9x-57

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Solution for 21-1=9x-57 equation:


Simplifying
21 + -1 = 9x + -57

Combine like terms: 21 + -1 = 20
20 = 9x + -57

Reorder the terms:
20 = -57 + 9x

Solving
20 = -57 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
20 + -9x = -57 + 9x + -9x

Combine like terms: 9x + -9x = 0
20 + -9x = -57 + 0
20 + -9x = -57

Add '-20' to each side of the equation.
20 + -20 + -9x = -57 + -20

Combine like terms: 20 + -20 = 0
0 + -9x = -57 + -20
-9x = -57 + -20

Combine like terms: -57 + -20 = -77
-9x = -77

Divide each side by '-9'.
x = 8.555555556

Simplifying
x = 8.555555556

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