Đáp án:a, x=-11/18
b, x=-10
c, x= -1/18
d, x= 3/8 hoặc x=3/8
Giải thích các bước giải:
a, -5/9-x=7/18+(-1/3)
-5/9-x=1/18
x=-5/9-1/18
x=-11/18
b,(2,8x-32)÷2/3=-90
2,8x-32=-90×2/3
2,8x-32=-60
2,8x=-60+32
2,8x=-28
x=-10
c, -3/4+3/4×(x-1/2)+1/6=-1
-3/4+3/4×(x-1/2)=-1-1/6
-3/4+3/4×(x-1/2)=-7/6
3/4×(x-1/2)=-7/6-(-3/4)
3/4×(x-1/2)=-5/12
x-1/2=-5/12÷3/4
x-1/2=-5/9
x=-5/9+1/2
x=-1/18
d, ║2/3x-5/8║-1/6+2/3-7/8=0
║2/3x-5/8║-1/6+2/3=0+7/8=7/8
║2/3x-5/8║-1/6=7/8-2/3
║2/3x-5/8║-1/6=5/24
║2/3x-5/8║=5/24+1/6=3/8
⇒TH1
2/3x-5/8=3/8
2/3x=3/8+5/8
2/3x=1
x=1÷2/3
x=3/2
TH2
2/3x-5/8=-3/8
2/3x=-3/8+5/8
2/3x=1/4
x=1/4÷2/3
x=3/8
vậy x=3/8 hoặc x=3/2
nếu hay thì để cho mình câu trả lời hay nhá