30+a=51

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Solution for 30+a=51 equation: 


Simplifying
30 + a = 51

Solving
30 + a = 51

Solving for variable 'a'.

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

Add '-30' to each side of the equation.
30 + -30 + a = 51 + -30

Combine like terms: 30 + -30 = 0
0 + a = 51 + -30
a = 51 + -30

Combine like terms: 51 + -30 = 21
a = 21

Simplifying
a = 21

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