12+4a=30

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Solution for 12+4a=30 equation: 


Simplifying
12 + 4a = 30

Solving
12 + 4a = 30

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 4a = 30 + -12

Combine like terms: 12 + -12 = 0
0 + 4a = 30 + -12
4a = 30 + -12

Combine like terms: 30 + -12 = 18
4a = 18

Divide each side by '4'.
a = 4.5

Simplifying
a = 4.5

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