SOLUTION: if i have a proof with the statement being AL+LS=SK+LS what would be the reason why with the given being AL=SK?

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Question 509501: if i have a proof with the statement being AL+LS=SK+LS what would be the reason why with the given being AL=SK?
Answer by tinbar(133) About Me  (Show Source):
You can put this solution on YOUR website!
LS = LS by law of identity. Therefore if AL+LS = SK + LS and since LS=LS, we MUST have AL+SK, otherwise the original statement cannot be true.