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Anonymous
The common factors of 30 and 42 are 1, 2, 3, and 6.
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1,2,3,6
3x + 12 = 42 3x = 30 x = 10
The lowest common denominator of 5/42 and 7/30 is 210.
4 x 9 = 36 So 9 goes into 42 = 4 times with a remainder of 6
42