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I keep getting the wrong answer. Reading Solve the system of equations by any method. 4x + 8y = 28 x - 2y = -7

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I keep getting the wrong answer.

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Reading Solve the system of equations by any method. 4x + 8y = 28 x - 2y = -7 Enter the exact answer as an ordered pair, (x, y). If there is no solution, enter NS. If there is an infinite number of solutions, enter the general solution as an ordered pair in terms of c

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