13a-8=9a+20

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Solution for 13a-8=9a+20 equation:


Simplifying
13a + -8 = 9a + 20

Reorder the terms:
-8 + 13a = 9a + 20

Reorder the terms:
-8 + 13a = 20 + 9a

Solving
-8 + 13a = 20 + 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.
-8 + 13a + -9a = 20 + 9a + -9a

Combine like terms: 13a + -9a = 4a
-8 + 4a = 20 + 9a + -9a

Combine like terms: 9a + -9a = 0
-8 + 4a = 20 + 0
-8 + 4a = 20

Add '8' to each side of the equation.
-8 + 8 + 4a = 20 + 8

Combine like terms: -8 + 8 = 0
0 + 4a = 20 + 8
4a = 20 + 8

Combine like terms: 20 + 8 = 28
4a = 28

Divide each side by '4'.
a = 7

Simplifying
a = 7

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