27-10-2016
Mathematics

contestada

6x+5y=120, 7x+11y=202 solve for x and y

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AliceLEE AliceLEE

27-10-2016

6x=120-5y -> x=20-5/6*y -> 7(20-5/6*y) + 11y =202 -> 140-35/6*y + 11y = 202 -> 140+31/6*y=202 -> 31/6*y = 62 -> y = 12.

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