3a+7-a-12+1=

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Solution for 3a+7-a-12+1= equation:


Simplifying
3a + 7 + -1a + -12 + 1 = 0

Reorder the terms:
7 + -12 + 1 + 3a + -1a = 0

Combine like terms: 7 + -12 = -5
-5 + 1 + 3a + -1a = 0

Combine like terms: -5 + 1 = -4
-4 + 3a + -1a = 0

Combine like terms: 3a + -1a = 2a
-4 + 2a = 0

Solving
-4 + 2a = 0

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 + 2a = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 2a = 0 + 4
2a = 0 + 4

Combine like terms: 0 + 4 = 4
2a = 4

Divide each side by '2'.
a = 2

Simplifying
a = 2

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