A+b=90

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Solution for A+b=90 equation: 


Simplifying
A + b = 90

Solving
A + b = 90

Solving for variable 'A'.

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

Add '-1b' to each side of the equation.
A + b + -1b = 90 + -1b

Combine like terms: b + -1b = 0
A + 0 = 90 + -1b
A = 90 + -1b

Simplifying
A = 90 + -1b

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