4a-9+4a-9+4a=180

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Solution for 4a-9+4a-9+4a=180 equation:


Simplifying
4a + -9 + 4a + -9 + 4a = 180

Reorder the terms:
-9 + -9 + 4a + 4a + 4a = 180

Combine like terms: -9 + -9 = -18
-18 + 4a + 4a + 4a = 180

Combine like terms: 4a + 4a = 8a
-18 + 8a + 4a = 180

Combine like terms: 8a + 4a = 12a
-18 + 12a = 180

Solving
-18 + 12a = 180

Solving for variable 'a'.

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

Add '18' to each side of the equation.
-18 + 18 + 12a = 180 + 18

Combine like terms: -18 + 18 = 0
0 + 12a = 180 + 18
12a = 180 + 18

Combine like terms: 180 + 18 = 198
12a = 198

Divide each side by '12'.
a = 16.5

Simplifying
a = 16.5

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