2x-39=21

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Solution for 2x-39=21 equation: 


Simplifying
2x + -39 = 21

Reorder the terms:
-39 + 2x = 21

Solving
-39 + 2x = 21

Solving for variable 'x'.

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

Add '39' to each side of the equation.
-39 + 39 + 2x = 21 + 39

Combine like terms: -39 + 39 = 0
0 + 2x = 21 + 39
2x = 21 + 39

Combine like terms: 21 + 39 = 60
2x = 60

Divide each side by '2'.
x = 30

Simplifying
x = 30

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