84 × 7 = 588
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84
The greatest common factor of 42, 49 and 84 is 7.
you say: 5x+7=84-6x 5x+6x+7=84-6x+6x 11x+7=84 11x+7-7=84-7 11x=77 x=77/11 x=7
84 = 22 x 3 x 7
LCM(84, 35) = 420. 84 = 2² x 3 x 7 35 = 5 x 7 lcm = 2² x 3 x 5 x 7 = 420