9a-4=77

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Solution for 9a-4=77 equation: 


Simplifying
9a + -4 = 77

Reorder the terms:
-4 + 9a = 77

Solving
-4 + 9a = 77

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 + 9a = 77 + 4

Combine like terms: -4 + 4 = 0
0 + 9a = 77 + 4
9a = 77 + 4

Combine like terms: 77 + 4 = 81
9a = 81

Divide each side by '9'.
a = 9

Simplifying
a = 9

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