15-4a=2a-12

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Solution for 15-4a=2a-12 equation:


Simplifying
15 + -4a = 2a + -12

Reorder the terms:
15 + -4a = -12 + 2a

Solving
15 + -4a = -12 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
15 + -4a + -2a = -12 + 2a + -2a

Combine like terms: -4a + -2a = -6a
15 + -6a = -12 + 2a + -2a

Combine like terms: 2a + -2a = 0
15 + -6a = -12 + 0
15 + -6a = -12

Add '-15' to each side of the equation.
15 + -15 + -6a = -12 + -15

Combine like terms: 15 + -15 = 0
0 + -6a = -12 + -15
-6a = -12 + -15

Combine like terms: -12 + -15 = -27
-6a = -27

Divide each side by '-6'.
a = 4.5

Simplifying
a = 4.5

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