1a-12=4a

Solution for 1a-12=4a equation:

Simplifying
1a + -12 = 4a

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

Solving
-12 + 1a = 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.
-12 + 1a + -4a = 4a + -4a

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

Combine like terms: 4a + -4a = 0
-12 + -3a = 0

Add '12' to each side of the equation.
-12 + 12 + -3a = 0 + 12

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

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

Divide each side by '-3'.
a = -4

Simplifying
a = -4