A+20+b=90

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Solution for A+20+b=90 equation:


Simplifying
A + 20 + b = 90

Reorder the terms:
20 + A + b = 90

Solving
20 + A + b = 90

Solving for variable 'A'.

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

Add '-20' to each side of the equation.
20 + A + -20 + b = 90 + -20

Reorder the terms:
20 + -20 + A + b = 90 + -20

Combine like terms: 20 + -20 = 0
0 + A + b = 90 + -20
A + b = 90 + -20

Combine like terms: 90 + -20 = 70
A + b = 70

Add '-1b' to each side of the equation.
A + b + -1b = 70 + -1b

Combine like terms: b + -1b = 0
A + 0 = 70 + -1b
A = 70 + -1b

Simplifying
A = 70 + -1b

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