4a-4=8+9

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Solution for 4a-4=8+9 equation: 


Simplifying
4a + -4 = 8 + 9

Reorder the terms:
-4 + 4a = 8 + 9

Combine like terms: 8 + 9 = 17
-4 + 4a = 17

Solving
-4 + 4a = 17

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 + 4a = 17 + 4

Combine like terms: -4 + 4 = 0
0 + 4a = 17 + 4
4a = 17 + 4

Combine like terms: 17 + 4 = 21
4a = 21

Divide each side by '4'.
a = 5.25

Simplifying
a = 5.25

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