Question: After Theorem 1.5 we note that multiplying a row by 0 is not allowed because that could change a solution set. Give an example of

After Theorem 1.5 we note that multiplying a row by 0 is not allowed because that could change a solution set. Give an example of a system with solution set S0 where after multiplying a row by 0 the new system has a solution set S1 and S0 is a proper subset of S1. Give an example where S0 = S1.

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