a: -1,2x=1,644
nên x=1,644:(-1,2)=-1,44
b: 3x+1,12=-4,46
=>3x=-5,58
hay x=-1.86
c: 4,48:x=-3,584
=>x=-4,48:3,584=-5/4
a) x . (-1,2) = 1,644
x = 1,644 : (-1,2)
x = -1,37
vậy x = ....
b) 1,12 + 3x = -4,46
3x = 1,12 + 4,46
3x = 5,58
x = 5,58 : 3
x = 1,86
vậy x = ...
c) 4,48 : x = - 3,584
x = 4,48 : (-3,584)
x = -1,25
vậy x =...
nếu sai câu nào mog bạn thông cảm ^^
a) x . ( - 1,2 ) = 1,644
x = 1,644 : ( -1,2 )
x = - 1,37
b) 1,12 + 3x = - 4,46
3x = - 4,46 - 1,12
3x = 3,34
x = 3,34 : 3
x = 1,1133
c) 4,48 : x = - 3,584
x = 4,48 : ( - 3,584 )
x = - 1,25
