30-1a=4a+12

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Solution for 30-1a=4a+12 equation:


Simplifying
30 + -1a = 4a + 12

Reorder the terms:
30 + -1a = 12 + 4a

Solving
30 + -1a = 12 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
30 + -1a + -4a = 12 + 4a + -4a

Combine like terms: -1a + -4a = -5a
30 + -5a = 12 + 4a + -4a

Combine like terms: 4a + -4a = 0
30 + -5a = 12 + 0
30 + -5a = 12

Add '-30' to each side of the equation.
30 + -30 + -5a = 12 + -30

Combine like terms: 30 + -30 = 0
0 + -5a = 12 + -30
-5a = 12 + -30

Combine like terms: 12 + -30 = -18
-5a = -18

Divide each side by '-5'.
a = 3.6

Simplifying
a = 3.6

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