12-8a=25-9a

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Solution for 12-8a=25-9a equation:


Simplifying
12 + -8a = 25 + -9a

Solving
12 + -8a = 25 + -9a

Solving for variable 'a'.

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

Add '9a' to each side of the equation.
12 + -8a + 9a = 25 + -9a + 9a

Combine like terms: -8a + 9a = 1a
12 + 1a = 25 + -9a + 9a

Combine like terms: -9a + 9a = 0
12 + 1a = 25 + 0
12 + 1a = 25

Add '-12' to each side of the equation.
12 + -12 + 1a = 25 + -12

Combine like terms: 12 + -12 = 0
0 + 1a = 25 + -12
1a = 25 + -12

Combine like terms: 25 + -12 = 13
1a = 13

Divide each side by '1'.
a = 13

Simplifying
a = 13

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