2A+B-A+3B=

Solution for 2A+B-A+3B= equation:

Simplifying
2A + B + -1A + 3B = 0

Reorder the terms:
2A + -1A + B + 3B = 0

Combine like terms: 2A + -1A = 1A
1A + B + 3B = 0

Combine like terms: B + 3B = 4B
1A + 4B = 0

Solving
1A + 4B = 0

Solving for variable 'A'.

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

Add '-4B' to each side of the equation.
1A + 4B + -4B = 0 + -4B

Combine like terms: 4B + -4B = 0
1A + 0 = 0 + -4B
1A = 0 + -4B
Remove the zero:
1A = -4B

Divide each side by '1'.
A = -4B

Simplifying
A = -4B