\(x=\dfrac{7}{2}:\dfrac{5}{6}\)
\(x=\dfrac{21}{5}\)
`5/6 . x = 7/2`
`x = 7/2 : 5/6`
`x = 7/2 . 6/5`
`x = 42/10`
`x = 4,2`
Vậy `x = 4,2`
`=>(5x)/6=7/2`
`=>2(5x)=7.6`
`=>2(5x)=42`
`=>5x=21`
`=>x=21/5`
\(x=\dfrac{7}{2}:\dfrac{5}{6}\)
\(x=\dfrac{21}{5}\)
`5/6 . x = 7/2`
`x = 7/2 : 5/6`
`x = 7/2 . 6/5`
`x = 42/10`
`x = 4,2`
Vậy `x = 4,2`
`=>(5x)/6=7/2`
`=>2(5x)=7.6`
`=>2(5x)=42`
`=>5x=21`
`=>x=21/5`
a. 2/3x-1/2=1/10
b. 39/7:x=13
c. (14/5x-50):2/3=51
d. (x+1/2)(2/3-2x)=0
e. 2/3x-1/2x=5/12
g. (x.44/7+3/7)11/5-3/7=-2
h. x.13/4+(-7/6)x-5/3=5/12
i.93/17:x+(-4/17):x+22/7:52/3=4/11
j. 17/2-|2x-3/4|=-7/4
k. (x+1/5)^2+17/25=26/25
l. -32/27-(3x-7/9)^3=-24/27
tính nhanh nếu có thể
5 phần 2 phần 5 . 4 phần 2 phần 7 + 5 phần 5 phần 7 . 5 phần 2 phần 5
75% - 1 phần 1 phần 2 + 0. 5 : 5 phần 12 - ( -1 phần 2 ) ^ 2
tính
\(\dfrac{-5}{7}.\dfrac{5}{11}+\dfrac{-5}{7}.\dfrac{2}{11}-\dfrac{5}{7}:\dfrac{11}{4}\)
x.3 1/4+(-7/6).x-1 2/3=5/12
5 8/17:x+(-4/17):x+3 1/7:17 1/3=4/11
-1 5/27-(3x-7/9)^3=-24/27
3(x-1/2)-5(x+3/5)=-x+1/5
Thực hiện phép tính : \(1\dfrac{3}{5}+\dfrac{\dfrac{2}{7}+\dfrac{2}{17}+\dfrac{2}{37}}{\dfrac{5}{7}+\dfrac{5}{17}+\dfrac{5}{37}}.x=\dfrac{16}{5}\)
-9/46-4 1/23:(3 1/4 - x:3/5)+2 8/23=1
(6 2/7*x + 3/7):2 1/5-3/7=-1
5 8/17:x+(-1/17):x +3 1/17:17 1/3=4/17
Bài 1. Thực hiện phép tính:
a) |5.0,6+\(\dfrac{2}{3}\)|- \(\dfrac{1}{3}\)
b)(0,25 - 1\(\dfrac{1}{4}\)) : 5 - \(\dfrac{1}{5}\).(-3)\(^2\)
c)\(\dfrac{14}{17}.\dfrac{7}{5}-\dfrac{-3}{17}:\dfrac{5}{7}\)
d)\(\dfrac{7}{16}+\dfrac{-9}{25}+\dfrac{9}{16}+\dfrac{-16}{25}\)
e)\(\dfrac{5}{6}+2\sqrt{\dfrac{4}{9}}\)
A = 7/12 + 5/12 : 6 - 11/36
B= ( 4/5 + 1/2 ) : ( 3/13 - 8/13 )
C = ( 2/3 - 1/4 + 5/11) : ( 5/12 + 1 - 7/11 )
1) tính hợp lí ( nếu có thể )
c) \(\dfrac{2}{-11}\). 6\(\dfrac{2}{7}\)+ \(\dfrac{3}{7}\):3 + 5 d) 1,75 : 5 + 2,5 . ( \(4^2\)- 4. 4,1)
2) tìm x
a) 1/2-x=-1/6 b) x+3,5=7,8-12,6:2 c) 7/35 = 35-x/-105