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x+(x+1)+(x+2)+(x+3)=42 4x+6=42 4x=36 x=9 answer: 9, 10, 11, and 12
42 and 55 have no common factor ((2 x 3 x 7) and (5 x 11)) so 42/55 is the simplest form.
22 = 2 x 11, 42 = 2 x 3 x 7, 51 = 3 x 17. So start with 22, then multiply factors that are not present, so the 2 is already present, and we have LCM of 22 and 42 = 2 x 11 x 3 x 7. Then with 51, the 3 is already present, so the answer is 2 x 11 x 3 x 7 x 17 = 7854
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