`2,5 - (-3/7)`
`= 5/2 + 3/7`
`= 35/14 + 6/14`
`= 41/14`
\(2,5-\left(-\dfrac{3}{7}\right)\)
\(=\dfrac{5}{2}+\dfrac{3}{7}\)
\(=\dfrac{35}{14}+\dfrac{6}{14}\)
\(=\dfrac{41}{14}\)
( 4x - 9 ) . ( 2,5 + -7/3 . x ) = 0
(-1,5). -2/3 + (2,5-3/4):7/4
kết bạn với mình ^_^!!!!!!!!!
x-75%x=-2,5
x\7=x-12\21
-3|x|=-2\3
0,5x-2\3x=7\12
x\8=-7\y=z\-18=-6\12
tìm x , biết:
a) \(x\) : \(4\dfrac{1}{3}\) = -2,5 b) \(\dfrac{3}{5}x\) + \(\dfrac{1}{4}\) = \(\dfrac{1}{10}\)
c) \(2\dfrac{7}{9}\) \(-\) \(\dfrac{12}{13}x\) = \(\dfrac{7}{9}\) d)\(\dfrac{-2}{3}-\dfrac{1}{3}\)\(\left(2x-5\right)=\dfrac{3}{2}\)
Bài 1: Tìm x, biết:
a) (0,75 x + 5/2) - 4/7 - (-1/3) = -5/6
b) (4 x - 9) . (2,5 + -7/3 x) = 0
Thanks
Thực hiện phép tính
a, ( - 2,5 ) . ( -1 1/2) - ( 1/5 - 1/7)
b, 5/8 : 6/8 + -1 1/3 . 2/3 - 7,5 + 2
5/7 - ( 5/7 - 2 ) - ( 2 + 4,5 )
Tính hợp lí:
a) \(\left(-0,4\right)+\dfrac{3}{8}+\left(-0,6\right)\)
b) \(\dfrac{4}{5}-1,8+0,375+\dfrac{5}{8}\)
c) \(\dfrac{7}{3}.\left(-2,5\right).\dfrac{6}{7}\)
d) \(\dfrac{7}{12}.\left(-2,34\right)-\dfrac{7}{12}.\left(-0,34\right)\)
e) \(\dfrac{-8}{3}.\dfrac{2}{11}-\dfrac{8}{3}:\dfrac{11}{9}\)
Giúp với!
a)0,5x-2/3x=7/12
b)x:4/1/3=-2,5
c)5,5x=13/15
d) (3x/7+1):(-4)=-1/28
a) 0,5x-2/3x=7/12
b) x:4/1/3=-2,5
c)5,5x=13/15
d) (3x/7+1):(-4)=-1/28
