Question

解方程.5/8+X=5/6、X--1/4=1/313/21--X=3/14、X--(2/5+1/3)=7/30

Answer 1

5/8+X=5/6

X = 5/6-5/8=5(8-6)/(6*8) = 5/24

X-1/4=1/3

X=1/3+1/4 = (4+3)/(3*4)=7/12

13/21-X=3/14

X=13/21-3/14=(26-9)/42=17/42

X-(2/5+1/3)=7/30

X = 7/30+2/5+1/3 = (7+12+10)/30 = 29/30