A+B-7=123

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Solution for A+B-7=123 equation:


Simplifying
A + B + -7 = 123

Reorder the terms:
-7 + A + B = 123

Solving
-7 + A + B = 123

Solving for variable 'A'.

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

Add '7' to each side of the equation.
-7 + A + 7 + B = 123 + 7

Reorder the terms:
-7 + 7 + A + B = 123 + 7

Combine like terms: -7 + 7 = 0
0 + A + B = 123 + 7
A + B = 123 + 7

Combine like terms: 123 + 7 = 130
A + B = 130

Add '-1B' to each side of the equation.
A + B + -1B = 130 + -1B

Combine like terms: B + -1B = 0
A + 0 = 130 + -1B
A = 130 + -1B

Simplifying
A = 130 + -1B

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