Changing the subject of a formula

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The discussion focuses on manipulating the formula XA + BA = B to isolate X. The initial step involves subtracting BA from both sides, resulting in XA = B - BA. To solve for X, one must divide by A, leading to the solution X = (B - BA) / A for real numbers. In the case of matrices, assuming A is invertible, the solution is X = (B - BA)A^-1.

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chuckienz
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Ok, this most likely will be a silly question but I am having trouble trying to make X the subject of the formula XA +BA = B

im hoping someone is able to enlighten me

Thanks
 
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What are X, A and B? It matters as it tells you what rules of manipulation are valid.

You can certainly subtract BA from both sides:

XA = B-BA

Now you need to 'divide' by A. If this is about real numbers, X=(B-BA)/A.

(If it were matrices then assuming A is invertible, X=(B-BA)A^-1.)
 

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