X-30=21

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Solution for X-30=21 equation: 


Simplifying
X + -30 = 21

Reorder the terms:
-30 + X = 21

Solving
-30 + X = 21

Solving for variable 'X'.

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

Add '30' to each side of the equation.
-30 + 30 + X = 21 + 30

Combine like terms: -30 + 30 = 0
0 + X = 21 + 30
X = 21 + 30

Combine like terms: 21 + 30 = 51
X = 51

Simplifying
X = 51

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