a) 26x+(1,5)^3×8=1
b) x+1/3=2/5-(-1/3)
c) |1-x|-9/25=(4/5)^2
d) 2-x/4=3x-1/3
e) x:27=2:(-3,6)
f) x/y=3/5 va 2x-y=11
giai ho mk vs
a) 26x+(1,5)^3×8=1
b) x+1/3=2/5-(-1/3)
c) |1-x|-9/25=(4/5)^2
d) 2-x/4=3x-1/3
e) x:27=2:(-3,6)
f) x/y=3/5 va 2x-y=11
giai ho mk vs
.
Đáp án:
a)x=-1
b) x=2/5
c)x=0 hoặc x=2
d)x=28/39
e)x=-15
f)
Giải thích các bước giải:
a) 26x +(1,5)³. 8=1
26x + 27/8 . 8=1
26x + 27=1
26x =1-27
26x=-26
x=-1
b) x+1/3=2/5-(-1/3)
x+1/3=2/5+1/3
x =2/5+1/3-1/3
x =2/5
c) |1-x|-9/25=(4/5)²
|1-x|= 16/25+9/25
|1-x|=1
TH1: 1-x=1
-x=1-1
x=0
TH2: 1-x=-1
-x=-1-1
x=2
Vậy x=0 hoặc x=2
d)2-x/4=3x-1/3
24-3x=36x-4
-3x-36x=-24-4
-39x=-28
x=28/39
e) x:27=2:(-3,6)
x:27=-5/9
x =-5/9. 27
x = -15