-3a+12+8a=7a-5a

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Solution for -3a+12+8a=7a-5a equation:


Simplifying
-3a + 12 + 8a = 7a + -5a

Reorder the terms:
12 + -3a + 8a = 7a + -5a

Combine like terms: -3a + 8a = 5a
12 + 5a = 7a + -5a

Combine like terms: 7a + -5a = 2a
12 + 5a = 2a

Solving
12 + 5a = 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.
12 + 5a + -2a = 2a + -2a

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

Combine like terms: 2a + -2a = 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

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