\(\dfrac{x}{9}\) < \(\dfrac{4}{7}\) < \(x\) + \(\dfrac{1}{9}\)

\(\dfrac{7x}{63}\) < \(\dfrac{36}{63}\) < \(\dfrac{63x}{63}\) + \(\dfrac{7}{63}\)

7\(x\) < 36 < 63\(x\) + 7

⇒\(\left\{{}\begin{matrix}7x< 36\\63x+7>36\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}x< \dfrac{36}{7}\\63x>36-7\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}x< \dfrac{36}{7}\\63x>29\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}x< \dfrac{36}{7}\\x>\dfrac{29}{63}\end{matrix}\right.\)

\(\dfrac{29}{63}\)<  \(x\) < \(\dfrac{36}{7}\) vì \(x\in\) Z nên \(x\in\) { 1; 2; 3; 4; 5}

⇒ \(\dfrac{x}{9}\) = \(\dfrac{1}{9}\); \(\dfrac{2}{9}\); \(\dfrac{3}{9}\); \(\dfrac{4}{9}\);\(\dfrac{5}{9}\)

\(\dfrac{x}{9}< \dfrac{4}{7}< \dfrac{x+1}{9}\)

=>\(\dfrac{7x}{63}< \dfrac{36}{63}< \dfrac{7x+7}{63}\)

\(\Rightarrow7x< 36< 7x+7\)

\(\Rightarrow x< \dfrac{36}{7}< x+1\)

\(\Rightarrow x< 5\dfrac{1}{7}< x+1\)

\(\Rightarrow x=5\)

tik cho mình nhé

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cho like ik

ik là gì

X : 0,25 + X x 11 = 24

X x 4 + X x 11 = 24

X x (4 + 11) = 24

X x 15 = 24

X         = 24 : 15 = 1,6

Vậy X = 1,6

a.X x 5 + X x4 = 36

X (5+4) = 36 

X = 4

b. X x 4 - X x3 =  18

X (4-3) = 18

X = 18

X :0,2 + x X 4=36

X :2/10+x x 4=36

x x10/2+x x 4 =36

x x5 + x x4 =36

x x (4+5)=36

x x 9 =36

x=36:9

x=4

x :0.25 - x x 3 =18

x:25/100- x x 3=18 

x x100/25- x x 3=18

x x 4- x x 3 =18

x x(4-3)=18

x x 1=18

x=18:1

x=18

a) \(\dfrac{13}{20}+\dfrac{3}{5}+x=\dfrac{5}{6}\)

\(\Rightarrow\dfrac{5}{4}+x=\dfrac{5}{6}\)

\(\Rightarrow x=\dfrac{5}{6}-\dfrac{5}{4}\)

\(\Rightarrow x=\dfrac{-5}{12}\)

b) \(x+\dfrac{1}{3}=\dfrac{2}{5}-\dfrac{-1}{3}\)

\(\Rightarrow x+\dfrac{1}{3}=\dfrac{11}{15}\)

\(\Rightarrow x=\dfrac{11}{15}-\dfrac{1}{3}\)

\(\Rightarrow x=\dfrac{2}{5}\)

c)\(\dfrac{-5}{8}-x=\dfrac{-3}{20}-\dfrac{-1}{6}\)

\(\dfrac{-5}{8}-x=\dfrac{1}{60}\)

\(\Rightarrow x=\dfrac{-5}{8}-\dfrac{1}{60}\)

\(\Rightarrow x=\dfrac{-77}{120}\)

d) \(\dfrac{3}{5}-x=\dfrac{1}{4}+\dfrac{7}{10}\)

\(\Rightarrow\dfrac{3}{5}-x=\dfrac{19}{20}\)

\(\Rightarrow x=\dfrac{3}{5}-\dfrac{19}{20}\)

\(\Rightarrow x=\dfrac{-7}{20}\)

e) \(\dfrac{-3}{7}-x=\dfrac{4}{5}+\dfrac{-2}{3}\)

\(\Rightarrow\dfrac{-3}{7}-x=\dfrac{2}{15}\)

\(\Rightarrow x=\dfrac{-3}{7}-\dfrac{2}{15}\)

\(\Rightarrow x=\dfrac{-59}{105}\)

g) \(\dfrac{-5}{6}-x=\dfrac{7}{12}+\dfrac{-1}{3}\)

\(\Rightarrow\dfrac{-5}{6}-x=\dfrac{1}{4}\)

\(\Rightarrow x=\dfrac{-5}{6}-\dfrac{1}{4}\)

\(\Rightarrow x=\dfrac{-13}{12}\)

\(x\) : 0,25 + \(x\) x 11 = 24

\(x\) x 4 + \(x\) x 11 = 24

\(x\) x (4 + 11) = 24

\(x\) x 15 = 24

x = 24 : 15

x = 1,6

x : 0,25 + x x 11 = 24

X x 4 + X x 11 = 24

X x ( 4 + 11 ) = 24

X x 15 = 24

X = 24 : 15

X = 1,6

Trả lời hộ mình

giúp với ạ các bạn ơi

a) 25 : x = 125 : 100

25 : x = 1,25

x = 25 : 1,25

x = 20

b) 35,76 : x - 25,76 : x = 100

(35,76 - 25,76) : x = 100

10 : x = 100

x = 10 : 100

x = 0,1

25 : \(x\) = 125 : 100

25 : \(x\) = 1,25

       \(x\) = 25 : 1,25

        \(x\)  = 20

b, 35,76 : \(x\) - 25,76 : \(x\) = 100

    (35,76  - 25,76) ; \(x\)   = 100

    10 : \(x\)                        = 100

          \(x\)                        = 10 : 100

          \(x\)                        = 0,1 

X x 8 + X x 100 + X x 5 + X x 4 = 34 + 200

X x ( 8 + 100 + 5 + 4 )               = 234

X x 117                                      = 234 : 117

X                                                = 2

học tốt

x:0,125+x:0,01+x:0,2+x:0,25=34+200

x:0,125+x:0.01+x:0.2+x:0.25=234

x*8+x*100+x*5+x*4              =234

x*(8+100+5+4)                     =234

x*117                                    =234

x                                            =234:117

x                                            =2

k cho mk nha!