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Please help !!
20 points !!!!

Please help !! 20 points !!!!-example-1
User Quka
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4d = 6r - 12 \\ 6r = 4d + 12 \\ r = (1)/(6) (4d + 12) \\ r = (2 * 2)/(3 * 2) d + (12)/(6) \\ r = (2)/(3) d + 2
User Maka
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