21-3x=-51

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Solution for 21-3x=-51 equation: 


Simplifying
21 + -3x = -51

Solving
21 + -3x = -51

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 + -3x = -51 + -21

Combine like terms: 21 + -21 = 0
0 + -3x = -51 + -21
-3x = -51 + -21

Combine like terms: -51 + -21 = -72
-3x = -72

Divide each side by '-3'.
x = 24

Simplifying
x = 24

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