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Mathematics 16 Online
OpenStudy (anonymous):

Sharon went to solve the following system and her steps are shown. Was she correct? If not, which step is incorrect and why? x - y = 9 x + y = 15 Step One: Add the systems: 2x = 26 Step Two: Solve for x: x = 13 Step Three: Solve for y: 13 + y = 15 so y = 2

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