周六还上课啊
(5/6)+x=3/4
x=(3/4)-(5/6)
x=(9-10)/12
x=-(1/12)
x-(1/4)=3/8
x=(3/8)+(1/4)
x=(3+2)/8
x=5/8
x÷(5/7)=25
x=25x(5/7)
x=125/7
解:
(1)
x=3/4-5/6
x=-1/12;
(2)
x=3/8+1/4
x=5/8;
(3)
x=25x7/5
x=35
x=3/4 - 5/6 =-1/12
x= 3/8+ 1/4 =5/8
x=25 - 7/5 = 118/5
发红包给你解答可以不