A*a-b=55

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Solution for A*a-b=55 equation: 


Simplifying
A * a + -1b = 55

Multiply A * a
aA + -1b = 55

Solving
aA + -1b = 55

Solving for variable 'a'.

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

Add 'b' to each side of the equation.
aA + -1b + b = 55 + b

Combine like terms: -1b + b = 0
aA + 0 = 55 + b
aA = 55 + b

Divide each side by 'A'.
a = 55A-1 + bA-1

Simplifying
a = 55A-1 + bA-1

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