A-55=90

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Solution for A-55=90 equation: 


Simplifying
A + -55 = 90

Reorder the terms:
-55 + A = 90

Solving
-55 + A = 90

Solving for variable 'A'.

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

Add '55' to each side of the equation.
-55 + 55 + A = 90 + 55

Combine like terms: -55 + 55 = 0
0 + A = 90 + 55
A = 90 + 55

Combine like terms: 90 + 55 = 145
A = 145

Simplifying
A = 145

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