2a-12=15-7a

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Solution for 2a-12=15-7a equation:


Simplifying
2a + -12 = 15 + -7a

Reorder the terms:
-12 + 2a = 15 + -7a

Solving
-12 + 2a = 15 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
-12 + 2a + 7a = 15 + -7a + 7a

Combine like terms: 2a + 7a = 9a
-12 + 9a = 15 + -7a + 7a

Combine like terms: -7a + 7a = 0
-12 + 9a = 15 + 0
-12 + 9a = 15

Add '12' to each side of the equation.
-12 + 12 + 9a = 15 + 12

Combine like terms: -12 + 12 = 0
0 + 9a = 15 + 12
9a = 15 + 12

Combine like terms: 15 + 12 = 27
9a = 27

Divide each side by '9'.
a = 3

Simplifying
a = 3

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