-a+4a+12=-18

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Solution for -a+4a+12=-18 equation:


Simplifying
-1a + 4a + 12 = -18

Reorder the terms:
12 + -1a + 4a = -18

Combine like terms: -1a + 4a = 3a
12 + 3a = -18

Solving
12 + 3a = -18

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 + 3a = -18 + -12

Combine like terms: 12 + -12 = 0
0 + 3a = -18 + -12
3a = -18 + -12

Combine like terms: -18 + -12 = -30
3a = -30

Divide each side by '3'.
a = -10

Simplifying
a = -10

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