X-21=40

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Solution for X-21=40 equation: 


Simplifying
X + -21 = 40

Reorder the terms:
-21 + X = 40

Solving
-21 + X = 40

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 + X = 40 + 21

Combine like terms: -21 + 21 = 0
0 + X = 40 + 21
X = 40 + 21

Combine like terms: 40 + 21 = 61
X = 61

Simplifying
X = 61

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