180=(2a+6)+(7a+3)

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Solution for 180=(2a+6)+(7a+3) equation:


Simplifying
180 = (2a + 6) + (7a + 3)

Reorder the terms:
180 = (6 + 2a) + (7a + 3)

Remove parenthesis around (6 + 2a)
180 = 6 + 2a + (7a + 3)

Reorder the terms:
180 = 6 + 2a + (3 + 7a)

Remove parenthesis around (3 + 7a)
180 = 6 + 2a + 3 + 7a

Reorder the terms:
180 = 6 + 3 + 2a + 7a

Combine like terms: 6 + 3 = 9
180 = 9 + 2a + 7a

Combine like terms: 2a + 7a = 9a
180 = 9 + 9a

Solving
180 = 9 + 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.
180 + -9a = 9 + 9a + -9a

Combine like terms: 9a + -9a = 0
180 + -9a = 9 + 0
180 + -9a = 9

Add '-180' to each side of the equation.
180 + -180 + -9a = 9 + -180

Combine like terms: 180 + -180 = 0
0 + -9a = 9 + -180
-9a = 9 + -180

Combine like terms: 9 + -180 = -171
-9a = -171

Divide each side by '-9'.
a = 19

Simplifying
a = 19

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