Mathematics, 04.05.2021 01:00 jordenlehman

Mark is solving the following system. Step 1: He multiplies equation (1) by 7 and adds it to equation (3). Step 2: He multiplies equation (3) by 2 and adds it to equation (2). Which statement explains Mark’s mistake?

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Mark is solving the following system. Step 1: He multiplies equation (1) by 7 and adds it to equatio...

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