Gia Đào Duy
Giới thiệu về bản thân
a)x+2/5=-4/3 b)-5/6+1/3.x=(-1/2)^2 c)7/12-x+7/6.6/5=(-1/2)^3
x=-4/3-2/5 -5/6+1/3.x=1/4 7/12-x+7/6.6/5=-1/8
x=-20/15-6/15 1/3.x=1/4-(-5/6) 7/12-x+7/6=-1/8:6/5
x=-26/15 1/3.x=13/12 7/12-x+7/6=-5/48
Vậy x=-26/15 x=13/12:1/3 x+7/6=7/12-(-5/48)
x=13/12.3/1 x+7/6=29/24
x=39/12 x=29/24-7/6
Vậy x=39/12 x=29/24-28/24
x=1/24
Vậy x=1/24
a)4/9+1/4=16/36+9/36=25/36
b)1/3.(-4/5)+1/3.(-1/5)=1/3.[(-4/5)+(-1/5)]=1/3.(-1)=-1/3
c)1/5-1/4-1(1/2)^2=1/5-1/4-1/4=4/20-5/20-1/4=-1/20-1/4=-1/20-5/20=-6/20=3/10