A+B-A=125-(A+B)

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Solution for A+B-A=125-(A+B) equation:


Simplifying
A + B + -1A = 125 + -1(A + B)

Reorder the terms:
A + -1A + B = 125 + -1(A + B)

Combine like terms: A + -1A = 0
0 + B = 125 + -1(A + B)
B = 125 + -1(A + B)
B = 125 + (A * -1 + B * -1)
B = 125 + (-1A + -1B)

Solving
B = 125 + -1A + -1B

Solving for variable 'B'.

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

Add 'B' to each side of the equation.
B + B = 125 + -1A + -1B + B

Combine like terms: B + B = 2B
2B = 125 + -1A + -1B + B

Combine like terms: -1B + B = 0
2B = 125 + -1A + 0
2B = 125 + -1A

Divide each side by '2'.
B = 62.5 + -0.5A

Simplifying
B = 62.5 + -0.5A

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