A+(3a-5)+(4a-15)=180

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Solution for A+(3a-5)+(4a-15)=180 equation: 


Simplifying
A + (3a + -5) + (4a + -15) = 180

Reorder the terms:
A + (-5 + 3a) + (4a + -15) = 180

Remove parenthesis around (-5 + 3a)
A + -5 + 3a + (4a + -15) = 180

Reorder the terms:
A + -5 + 3a + (-15 + 4a) = 180

Remove parenthesis around (-15 + 4a)
A + -5 + 3a + -15 + 4a = 180

Reorder the terms:
-5 + -15 + A + 3a + 4a = 180

Combine like terms: -5 + -15 = -20
-20 + A + 3a + 4a = 180

Combine like terms: 3a + 4a = 7a
-20 + A + 7a = 180

Solving
-20 + A + 7a = 180

Solving for variable 'A'.

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

Add '20' to each side of the equation.
-20 + A + 20 + 7a = 180 + 20

Reorder the terms:
-20 + 20 + A + 7a = 180 + 20

Combine like terms: -20 + 20 = 0
0 + A + 7a = 180 + 20
A + 7a = 180 + 20

Combine like terms: 180 + 20 = 200
A + 7a = 200

Add '-7a' to each side of the equation.
A + 7a + -7a = 200 + -7a

Combine like terms: 7a + -7a = 0
A + 0 = 200 + -7a
A = 200 + -7a

Simplifying
A = 200 + -7a

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