x-18+21=72

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Solution for x-18+21=72 equation: 


Simplifying
x + -18 + 21 = 72

Reorder the terms:
-18 + 21 + x = 72

Combine like terms: -18 + 21 = 3
3 + x = 72

Solving
3 + x = 72

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + x = 72 + -3

Combine like terms: 3 + -3 = 0
0 + x = 72 + -3
x = 72 + -3

Combine like terms: 72 + -3 = 69
x = 69

Simplifying
x = 69

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