\(105-\left(135-7x\right):9=97\\ \Rightarrow\left(135-7x\right):9=105-97\\ \Rightarrow\left(135-7x\right):9=8\\ \Rightarrow135-7x=8.9\\ \Rightarrow135-7x=72\\ \Rightarrow7x=135-72\\ \Rightarrow7x=63\\ \Rightarrow x=63:7\\ \Rightarrow x=9\)

=>(135-7x):9=8

=>135-7x=72

=>7x=63

hay x=9

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105 - (135 - 7x) :9 = 97

⇒  (135 - 7x)  :9         =8

⇒            135 - 7x      =72

⇒                     7x       =63

⇒                            x  =9

 Vậy x=9

=>(135-7x):9=8

=>135-7x=72

=>7x=63

hay x=9

105 - (135 - 7x) :9 = 97

=> (135 - 7x)  :9         =8

=>           135 - 7x      =72

=>                  7x       =63

                        x  =9

           Vậy x=9

\(565-13x=370\\ 13x=565-370=195\\x=\dfrac{195}{13}=15\)

\(105-\left(135-7x\right):9=97\\ \dfrac{135-7x}{9}=105-97=8\\ 135-7x=9.8=72\\ 7x=135-72=63\\ x=\dfrac{63}{7}=9\)

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con cặc :)))))))))))))

a) 565 - 13.x = 370

13.x = 565 - 370

13.x = 195

x = 195 : 13

x = 15

b) 105 - (135 - 7x) : 9 = 97

(135 - 7x) : 9 = 105 - 97

(135 - 7x) : 9 = 8

135 - 7x = 8 x 9

135 - 7x = 72

7x = 135 - 72

7x = 63

x = 63 : 7

x = 9

a) 565 - 13.x = 370

13.x = 565 - 370

13.x = 195

x = 195 : 13

x = 15

b) 105 - (135 - 7x) : 9 = 97

(135 - 7x) : 9 = 105 - 97

(135 - 7x) : 9 = 8

135 - 7x = 8 x 9

135 - 7x = 72

7x = 135 - 72

7x = 63

x = 63 : 7

x = 9

cho like

a) 565 - 13.x = 370

13x = 565 - 370

13x = 195

x = 195 : 13

x = 15

b) 105 - (135 - 7x) : 9 = 97

(135 - 7x) : 9 = 105 - 97

(135 - 7x) : 9 = 8

135 - 7x = 8.9

135 - 7x = 72

7x = 135 - 72

7x = 63

x = 63 : 7

x = 9

1) \(\dfrac{5}{10}=\dfrac{5:5}{10:5}=\dfrac{1}{2}\)

\(\dfrac{-18}{-27}=\dfrac{-18:\left(-9\right)}{-27:\left(-9\right)}=\dfrac{2}{3}\)

\(\dfrac{-42}{105}=\dfrac{-42:21}{105:21}=\dfrac{-2}{5}\)

\(\dfrac{75}{-135}=\dfrac{75:\left(-15\right)}{-135:\left(-15\right)}=\dfrac{-5}{9}\)

\(\dfrac5{10}=\dfrac{5.1}{5.2}=\dfrac12\\\dfrac{-18}{-27}=\dfrac{(-9).2}{(-9).3}=\dfrac23\\\dfrac{-42}{105}=\dfrac{21.(-2)}{21.5}=\dfrac{-2}5\\\dfrac{75}{-135}=\dfrac{(-15).(-5)}{(-15).9}=\dfrac{-5}9\)

`5/10=1/2`

`-18/-27=2/3`

-42/105=-2/5`

`75/-135=-5/9``

5/7<7/6
17/13>45/52
4/3>99/100
34/56<42/53
97/252>85/163
73/97<91/95
 

5/7<7/6
17/13>45/52
4/3>99/100
34/56<42/53
97/252>85/163
73/97<91/95

ko có rảnh đâu nha con

1<

2>

3>

4<

5>

6<

a: 5/7<6/7

b: 17/13>1>45/52

c: 4/3>1>99/100

Tham khảo

a, 5<6 => 5/7 < 6/7

b, 17/13 > 1   45/52< 1  => 45/52 < 17/13

c, 8/7 > 1    7/8< 1   =>  7/8 >< 8/7

d, 9/5 > 1   5/8 < 1    => 9/5 > 5/8