![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{4}{6}< \frac{4}{x}< 1\)
\(\Rightarrow\frac{4}{6}< \frac{4}{x}< \frac{4}{4}\)
Mà giữa 4 và 6 là 5
\(\Rightarrow\frac{4}{6}< \frac{4}{5}< \frac{4}{4}\)
\(\Rightarrow x=5\)
học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
a) Ta có: 4/6=2/3=10/15 => x=10
b) Ta có: 2/5 < x/2 < 3/5
=> 4/10 < 5x/10 < 6/10
=> 5x=5
x=5:5
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 27 x 39 + 27 x 63 - 2 x 27
= 27 x ( 39 + 63 - 2 )
= 27 x 100
= 2700
b, 128 x 46 + 128 x 32 + 128x 22
= 128 x ( 46 + 32 + 22 )
= 128 x 100
= 12800
c, 12 x 35 + 35 x 182 - 35 x 94
= 35 x ( 12 + 182 - 94 )
= 35 x 100
= 3500
d, 456 : 2 x 18 + 456 : 3 - 102
= 228 x 18 + 152 - 102
= 4104 + 50
= 4154
\(\text{a, 27 x 39 + 27 x 63-2 x 27 =27 x (39+63-2) = 27 x 100 =2700}\)
\(\text{b, 128 x 46 +128 x 32 +128 x 22 =128 x (46+32+22)=128 x 100=12800}\)
\(\text{c , 12 x 35 +35 x 182 -35 x 94 =35 x (12+182-94)=35 x 100=3500.}\)
\(\text{d, 456:2 x 18 +456 :3 -102 =4140+152-102=4190}\)
2,
\(45-\left(x+9\right)=6\Rightarrow45-x-9-6\Rightarrow36-x=6\Rightarrow x=30\)
\(x+7-25=13\Rightarrow x-18=13\Rightarrow x=31\)
\(450:\left(x-19\right)=50\Rightarrow x-19=9\Rightarrow x=28\)
\(4\times\left(x+41\right)=400\Rightarrow x+41=100\Rightarrow x=59\)
\(x+73-26=76\Rightarrow x+47=76\Rightarrow x=31\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{2}{7}< \frac{4}{x}< \frac{1}{3}\)
\(\Rightarrow\frac{4}{14}< \frac{4}{x}< \frac{4}{12}\)
\(\Rightarrow\frac{4}{14}< \frac{4}{13}< \frac{4}{12}\)
Vậy x = 13
\(\frac{2}{7}< \frac{4}{x}< \frac{1}{3}=\frac{4}{14}< \frac{4}{x}< \frac{4}{12}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a= 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,0.11,0.12 ....................................
![](https://rs.olm.vn/images/avt/0.png?1311)
\(-1< \frac{x}{4}< \frac{1}{2}\)
\(\Leftrightarrow\frac{-4}{4}< \frac{x}{4}< \frac{2}{4}\)
\(\Leftrightarrow-4< x< 2\)
\(\Leftrightarrow x\in\left\{-3;-2;-1;0;1\right\}\)
\(-1< \frac{x}{4}< \frac{1}{2}\)
\(\Leftrightarrow\frac{-4}{4}< \frac{x}{4}< \frac{2}{4}\)
\(\Leftrightarrow-4< x< 2\)
\(\Leftrightarrow x\in\left\{-3;-2;-1;0;1\right\}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Tất cả dùng nhân chéo
a.3x=2.54=>x=36
b.15x=60=>x=4
c.2/3=4/6=>x=5
d.x=5;4(câu này ss từng phần)
Ta có \(\dfrac{4}{6}< \dfrac{4}{x}< 1=\dfrac{6}{6}\)
Vậy x = 5
4/6 < 4/x < 1
4/6 < 4/x < 4/4
vì 4/6 < 4/5 < 4/4
nên x = 5
vậy x = 5