x-42=21

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Solution for x-42=21 equation: 


Simplifying
x + -42 = 21

Reorder the terms:
-42 + x = 21

Solving
-42 + x = 21

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + x = 21 + 42

Combine like terms: -42 + 42 = 0
0 + x = 21 + 42
x = 21 + 42

Combine like terms: 21 + 42 = 63
x = 63

Simplifying
x = 63

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