![](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)
7,75 x 3,8 + 7,75 x 6,2
= 7,75 x ( 3,8 + 6,2 )
= 7,75 x 10
= 77,5
![](https://rs.olm.vn/images/avt/0.png?1311)
7,75 x X + 1,25 x X + X = 20
7,75 x X + 1,25 x X + X x 1 = 20
( 7,75 + 1,25 + 1 ) x X = 20
10 x X = 20
X = 20 : 10
X = 2
k mình nhé mình trả lời đầy đủ nhất và nhanh nhất
7,75 x X + 1,25 x X + X = 20
X x ( 7,75 + 1, 25 + 1 ) = 20
X x 10 = 20
X = 20 : 10
X = 10
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
7.75 - (0.5 * x : 5 - 6.2) = 5
0.5x : 5 - 6.2 = 2.75
0.5x : 5 = 8.95
0.5x = 44.75
x = 89.5
7,75 - (0,5 x X : 5 - 6,2) = 5
0,5x X:5-6,2=7,75-5
0,5x X:5-6,2=2,75
X:5-6,2=2,75:0,5=5,5
5-6,2=X:5,5
1,2=X:5,5
X=5,5x1,2
X=6,6
![](https://rs.olm.vn/images/avt/0.png?1311)
\(7,75.x+x+1,25.x=2,3\)
\(x\left(7,75+1+1,25\right)=2,3\)
\(x.10=2,3\)
\(x=\frac{2,3}{10}\)
\(x=0.23\)
hok tốt!!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(7,75-\left(0,5\times x\div5-6,2\right)=5\)
\(\Leftrightarrow0,5\times x\div5-6,2=7,75-5\)
\(\Leftrightarrow\frac{0,5\times x}{5}-6,2=2,75\)
\(\Leftrightarrow\frac{0,1\times5\times x}{5}=2,75+6,2\)
\(\Leftrightarrow0,1x=8,95\)
\(\Leftrightarrow x=\frac{8,95}{0,1}\)
\(\Leftrightarrow x=89,5\)
7,75 - (0,5 x X : 5-6,2)= 5
0,5 x X : 5-6,2 = 7,75 - 5
0,5 x X : 5-6,2 = 2,75
0,5 x X : 5 = 2,75 + 6,2
0,5 x X : 5 = 8,95
0,5 x X = 8,95 x 5
0,5 x X = 44,75
X = 44,75 : 0,5
=> X = 89,5
Chúc em học tốt!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
7,75 : x + 1,25 : x = 3,6
x : ( 7,75 + 1,25 + 1 ) = 3,6
x : 10 = 3,6
x = 3,6 x 10
x = 36
Chúc bạn may mắn trong những câu hỏi khác ^ v ^
![](https://rs.olm.vn/images/avt/0.png?1311)
6,3 x y + 3,7 x y = 100
(6,3 + 3,7) x y = 100
10 x y = 100
y = 100 : 10
y = 10
7,75 - (0,5 x y : 5 - 6,3) = 1,75
0,5 x y : 5 - 6,2 = 7,75 - 1,75
0,5 x y : 5 - 6,2 = 6
0,5 x y : 5 = 6 + 6,2
0,5 x y : 5 = 12,2
0,5 x y = 12,2 x 5
0,5 x y = 61
y = 61 : 0,5
y = 122
\(6,3\times y+3,7\times y=100\)
\(\Rightarrow y\times\left(6,3+3,7\right)=100\)
\(\Rightarrow y\times10=100\)
\(\Rightarrow y=100:10=10\)
\(7,75-\left(0,5\times y:5-6,2\right)=1,75\)
\(\Rightarrow0,5\times y:5-6,2=7,75-1,75\)
\(\Rightarrow0,5\times y:5-6,2=6\)
\(\Rightarrow0,5\times y:5=6+6,2\)
\(\Rightarrow0,5\times y:5=12,2\)
\(\Rightarrow y:5=12,2:0,5\)
\(\Rightarrow y:5=24,4\)
\(\Rightarrow y=24,4\times5=122\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(7,75-\left(0,5\times y\div5-6,2\right)=5\)
\(0,5\times y\div5-6,2=7,75-5=2,75\)
\(0,5\div5\times y-6,2=2,75\)
\(0,1\times y=2,75+6,2=8,95\)
\(\dfrac{1}{10}y=8,95\)
\(y=8,95\times10=89,5\)
\(y\div6\times7,2+1,3\times y+y\div2+15=19,95\)
\(1,2\times y+1,3\times y+0,5y=19,95-15=4,95\)
\(y\left(1,2+1,3+0,5\right)=4,95\)
\(2y=4,95\)
\(y=4,95\div2=2,475\)
\(7,75\times x+2,25\times x=50\)
=>\(x\times\left(7,75+2,25\right)=50\)
=>\(10\times x=50\)
=>x=5