57=3x-21

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Solution for 57=3x-21 equation:


Simplifying
57 = 3x + -21

Reorder the terms:
57 = -21 + 3x

Solving
57 = -21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
57 + -3x = -21 + 3x + -3x

Combine like terms: 3x + -3x = 0
57 + -3x = -21 + 0
57 + -3x = -21

Add '-57' to each side of the equation.
57 + -57 + -3x = -21 + -57

Combine like terms: 57 + -57 = 0
0 + -3x = -21 + -57
-3x = -21 + -57

Combine like terms: -21 + -57 = -78
-3x = -78

Divide each side by '-3'.
x = 26

Simplifying
x = 26

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