x=2993/225.

\(\frac{\frac{41}{10}}{\frac{9}{4}}=\frac{41}{10}\div\frac{9}{4}=\frac{41}{10}\times\frac{4}{9}=\frac{82}{45}\Rightarrow\frac{82}{45}=\frac{x}{7,3}\)

Đến đấy thôi

\(\frac{41}{\frac{10}{\frac{9}{4}}}=\frac{x}{7,3}\)

\(\frac{4,1}{2,25}=\frac{x}{7,3}\)

\(x=4,1\cdot7,3\div2,25\)

\(x=\frac{2993}{225}\)

X = 26937 / 400 hay = 67,3425

41/10 / 9/4 = x/7,3

4,1:2,25 = x:7,3

=> 4,1.7,3 = 2,25.x

29,93 = 2,25.x

x = 29,93:2,25

x = 13,30(2) hoặc x = \(\frac{2993}{225}\)

Tick hộ mik vs ạ thanks

\(\frac{\frac{41}{10}}{\frac{9}{4}}=\frac{x}{7,3}\)

\(\Rightarrow x.\frac{9}{4}=\frac{41}{10}.7,3\)

\(\Rightarrow x.\frac{9}{4}=\frac{2993}{100}\)

\(\Rightarrow x=\frac{2993}{100}:\frac{9}{4}\)

\(\Rightarrow x=\frac{2993}{225}\)

Vậy \(x=\frac{2993}{225}.\)

Chúc bạn học tốt!

\(\frac{\frac{41}{10}}{\frac{9}{4}}=\frac{x}{7,3}\\ \Rightarrow\frac{9}{4}x=\frac{41}{10}\cdot7,3\left(\text{tính chất của tỉ lệ thức}\right)\\ x=\frac{\frac{41}{10}\cdot7,3}{\frac{9}{4}}=\frac{2993}{225}\)

Vậy \(x=\frac{2993}{225}\)

a) 7.3x8.3+3.8x7.3-5x7.3x0.4

=7.3x(8.3+3.8-5x0.4)

=7.3x10.1

=73.73

b)\(\frac{1}{10}:0.1-\frac{1}{8}:0.125+\frac{1}{2}:0.5-\frac{1}{4}:0.25\)

=1-1+1-1=0

c)\(\left(\frac{2727}{3636}+\frac{1212}{5454}\right)\times\left(\frac{9}{70}\right)=\left(\frac{3}{4}+\frac{2}{9}\right)\times\left(\frac{9}{70}\right)\)

=\(\frac{35}{36}\times\frac{9}{70}\)=\(\frac{1}{8}\)

d) 120x999+\(\frac{120}{5\times2.5\times125\times4\times0.8}\)

=120x999+\(\frac{120}{5000}\)

=120x999+\(\frac{3}{125}\)

=119880.024

a 73,73

b1/8

c 119880,024

đúng nha 

k mình nha mn

sai câu d thì phải

a)

4 x 9 = 9 x 4

b)

5 x 10 = 10 x 5

c)

3 112 x 8 = 8 x 3 112

d)

41 320 x 3 = 3 x 41 320

`1/7+(-9/27)+10/7+(-4/7)`

`= (1/7 + (-4)/7+10/7) +(-9/27)`

`= 7/7 +(-9/27)`

`= 1 +(-9/27)`

`= 27/27 + (-9/27)`

`=18/27`

`=2/3`

__

`1,3 xx2 1/4 -1,3 xx3 1/4`

`= 1,3 xx 9/4 -1,3 xx 13/4`

`=1,3 xx (9/4-13/4)`

`=1,3xx(-4)/4`

`=1,3 xx (-1)`

`=-1,3`

__

`1/4: x = 2,4 -4/5`

`=> 1/4 : x= 12/5 -4/5`

`=> 1/4 : x=8/5`

`=> x=1/4 : 8/5`

`=> x= 1/4 xx 5/8`

`=> x= 5/32`

__

`5/4 ( x- 3/5)= -1/8`

`=> x-3/5 = -1/8 : 5/4`

`=> x-3/5 = -1/8 xx 4/5`

`=> x-3/5 =-4/40`

`=> x-3/5 =-1/10`

`=> x=-1/10 +3/5`

`=> x=-1/10 + 6/10`

`=> x= 5/10`

`=>x=1/2`

` @ yngoc`

=20/35*31+30/35*41+45/50*41+35/50*57

=5(1/31-1/35+1/35-1/41+1/41-1/50+1/50-1/57)

=5*(1/31-1/57)

=5*26/1767=130/1767