![](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)
![](https://rs.olm.vn/images/avt/0.png?1311)
13,28x37+6,72x53+13,28x63+6,72x47
=13,28 x 43,72 x 53 + 836,64 +315,84
=580,6016 x53+1152,48
=30771,8848+1152,48
=31924,3648
![](https://rs.olm.vn/images/avt/0.png?1311)
7,5 \(\times\) 0,5 + 2,5 : 2
= 7,5 \(\times\) 0,5 + 2,5 \(\times\) 0,5
= 0,5 \(\times\) ( 7,5 + 2,5)
= 0,5 \(\times\) 10
= 5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5,3\times6,7+\times6,7\times4,6+6,7:10\\ =5,3\times6,7+6,7\times4,6+\times6,7:\dfrac{10}{1}\\ =\times5,3\times6,7+6,7\times4,6+6,7\times\dfrac{1}{10}\\ =5,3\times6,7+6,7\times4,6\times+6,7\times0,1\\ =6,7\times\left(5,3+4,6+0,1\right)\\ =6,7\times10\\ =67\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x+x:5*7,5+x:2*9=315
x*1+x*3/2+x*9/2=315
x*(1+3/2+9/2)=315
x*7=315
x=315:7
x=45
X + X x ( 7,5 : 5 ) + X x ( 9 : 2 ) = 315
X x 1 + X x 1,5 + X x 4,5 = 315
X x ( 1 + 1,5 + 4,5 ) = 315
X x 7 = 315
X = 315 : 7
X = 45
![](https://rs.olm.vn/images/avt/0.png?1311)
bằng 40.2
40.2 nhé