A+b+3a+7b=

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Solution for A+b+3a+7b= equation: 


Simplifying
A + b + 3a + 7b = 0

Reorder the terms:
A + 3a + b + 7b = 0

Combine like terms: b + 7b = 8b
A + 3a + 8b = 0

Solving
A + 3a + 8b = 0

Solving for variable 'A'.

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

Add '-3a' to each side of the equation.
A + 3a + -3a + 8b = 0 + -3a

Combine like terms: 3a + -3a = 0
A + 0 + 8b = 0 + -3a
A + 8b = 0 + -3a
Remove the zero:
A + 8b = -3a

Add '-8b' to each side of the equation.
A + 8b + -8b = -3a + -8b

Combine like terms: 8b + -8b = 0
A + 0 = -3a + -8b
A = -3a + -8b

Simplifying
A = -3a + -8b

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