if 103x +51y=617and 97x+49y=583 then 2x+y_is equal to 12
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Add the given equations, and you get:
200x + 100y = 1200 (103 + 97, 51 + 49, 617 + 583)
Divide the obtained equation by 100, and you get:
2x + y = 12.
Hence proved.
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