A+D=I

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Solution for A+D=I equation: 


Simplifying
A + D = I

Solving
A + D = I

Solving for variable 'A'.

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

Add '-1D' to each side of the equation.
A + D + -1D = -1D + I

Combine like terms: D + -1D = 0
A + 0 = -1D + I
A = -1D + I

Simplifying
A = -1D + I

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