A+ar=b+r

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Solution for A+ar=b+r equation: 


Simplifying
A + ar = b + r

Solving
A + ar = b + r

Solving for variable 'A'.

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

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

Combine like terms: ar + -1ar = 0
A + 0 = b + -1ar + r
A = b + -1ar + r

Reorder the terms:
A = -1ar + b + r

Simplifying
A = -1ar + b + r

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