Question 177142
d/6+d/12+d/7+5+d/2+4=d   LCM is 84, so
14d/84  + 7d/84 + 12d/84 + 5 +42d/84 + 4 =d simplifying
75d/84 + 5 + 4=d
(25/28)d+9=d subtract (25/28)d from each side
9=(28/28)d-(25/28)d or
(3/28)d=9
d=(9*28)/3=84


Does this help???---------------ptaylor