9a-4=a+20

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Solution for 9a-4=a+20 equation:


Simplifying
9a + -4 = a + 20

Reorder the terms:
-4 + 9a = a + 20

Reorder the terms:
-4 + 9a = 20 + a

Solving
-4 + 9a = 20 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-4 + 9a + -1a = 20 + a + -1a

Combine like terms: 9a + -1a = 8a
-4 + 8a = 20 + a + -1a

Combine like terms: a + -1a = 0
-4 + 8a = 20 + 0
-4 + 8a = 20

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

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

Combine like terms: 20 + 4 = 24
8a = 24

Divide each side by '8'.
a = 3

Simplifying
a = 3

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