解方程.5/8+X=5/6、X--1/4=1/313/21--X=3/14、X--(2/5+1/3)=7/30
问题描述：
解方程.5/8+X=5/6、X--1/4=1/313/21--X=3/14、X--(2/5+1/3)=7/30
答
5/8+X=5/6X = 5/6-5/8=5(8-6)/(6*8) = 5/24X-1/4=1/3X=1/3+1/4 = (4+3)/(3*4)=7/1213/21-X=3/14X=13/21-3/14=(26-9)/42=17/42X-(2/5+1/3)=7/30X = 7/30+2/5+1/3 = (7+12+10)/30 = 29/30