A+b-a+2b=1a+3b

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Solution for A+b-a+2b=1a+3b equation:


Simplifying
A + b + -1a + 2b = 1a + 3b

Reorder the terms:
A + -1a + b + 2b = 1a + 3b

Combine like terms: b + 2b = 3b
A + -1a + 3b = 1a + 3b

Add '-3b' to each side of the equation.
A + -1a + 3b + -3b = 1a + 3b + -3b

Combine like terms: 3b + -3b = 0
A + -1a + 0 = 1a + 3b + -3b
A + -1a = 1a + 3b + -3b

Combine like terms: 3b + -3b = 0
A + -1a = 1a + 0
A + -1a = 1a

Solving
A + -1a = 1a

Solving for variable 'A'.

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

Add 'a' to each side of the equation.
A + -1a + a = 1a + a

Combine like terms: -1a + a = 0
A + 0 = 1a + a
A = 1a + a

Combine like terms: 1a + a = 2a
A = 2a

Simplifying
A = 2a

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