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Mathematics, 16.12.2020 19:40 rocky8875

I have ten mins please help mee Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9? x + 2y = 21

A.
4x + 6y = 64
B.
2x + y = 36
C.
4x + y = 21
D.
-3x + 4y = 33
E.
3x + 2y = 28

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