3a+4-2a=12

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Solution for 3a+4-2a=12 equation: 


Simplifying
3a + 4 + -2a = 12

Reorder the terms:
4 + 3a + -2a = 12

Combine like terms: 3a + -2a = 1a
4 + 1a = 12

Solving
4 + 1a = 12

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + 1a = 12 + -4

Combine like terms: 4 + -4 = 0
0 + 1a = 12 + -4
1a = 12 + -4

Combine like terms: 12 + -4 = 8
1a = 8

Divide each side by '1'.
a = 8

Simplifying
a = 8

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