3a-12-a=2-5

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Solution for 3a-12-a=2-5 equation:


Simplifying
3a + -12 + -1a = 2 + -5

Reorder the terms:
-12 + 3a + -1a = 2 + -5

Combine like terms: 3a + -1a = 2a
-12 + 2a = 2 + -5

Combine like terms: 2 + -5 = -3
-12 + 2a = -3

Solving
-12 + 2a = -3

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 + 2a = -3 + 12

Combine like terms: -12 + 12 = 0
0 + 2a = -3 + 12
2a = -3 + 12

Combine like terms: -3 + 12 = 9
2a = 9

Divide each side by '2'.
a = 4.5

Simplifying
a = 4.5

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