\(x\)\(:\)\(0,1\)\(+\)\(x\)\(\cdot5\)\(=24\)
x : 0,25 + x : 0,1 + x = 24
(Xx2)+(0,25+0,1)=24
Xx2+0,35=24
Xx2=24-0,35
Xx2=23,65
X=23,65:2
X=11,825
Nguyễn Vũ Hải Ninh : Sao thử lại, lại ra sai?
x:0,25+x:0,1+x=24
0,16:x=2-0,4
x:0,25+x:0,1+x=24
X x 4 + X x 10 + X = 24
X x (4+10+1)= 24
X x 15= 24
X= 24:15
X= 1,6
________
0,16:x=2-0,4
0,16:x = 1,6
x= 1,6 : 0,16
x= 10
x:0,25+x:0,1+x=24
X x 4 + X x 10 + X = 24
X x (4+10+1)= 24
X x 15= 24
X= 24:15=1,6
0,16:x=2-0,4
0,16:x = 1,6
x= 1,6 : 0,16
x= 10
x : 0,1 + x * 5 = 24
x:0,1+x*5=24
x*10+x*5=24
x*[10+5]=24
x*15=24
x=24:15=1,6
Vậy x bằng 1,6
A=\(\dfrac{2^{30}\cdot5^7+3^{13}\cdot5^{27}}{2^{27}\cdot5^7+2^{10}\cdot5^{27}}\)
M=\(\left(x-4\right)^{\left(x-5\right)^{\left(x-6\right)^{\left(x+6\right)^{\left(x+5\right)}}}}\) tại x=7
a: \(=\dfrac{2^{13}\cdot5^7\left(2^{17}+5^{20}\right)}{2^{10}\cdot5^7\left(2^{17}+5^{20}\right)}=2^3\)
b: \(M=\left(7-4\right)^{\left(7-5\right)^{\left(7-6\right)^{\left(7+6\right)^{\left(7+5\right)}}}}\)
\(=3^{2\cdot1\cdot13\cdot12}=3^{312}\)
\(\left(x\cdot5\right)+\left(x\cdot5\right)=25\)
\(\left(5.x\right)+\left(x.5\right)=25\)
\(\Leftrightarrow10x=25\)
\(\Leftrightarrow x=\frac{5}{2}\)
Vậy \(x=\frac{5}{2}\)
Tính nhẩm :
10 x 1000 =
1600 x 10 =
12 x 0,1 =
10 x 0,01 =
46 : 0,1 =
24 : 0,5 =
60 : 0,25 =
1) 10 000
2) 16 000
3) 1,2
4) 0.1
5) 460
6) 48
7) 240
~ Chúc bạn học tốt <3
10 x 1000 = 10000
1600 x 10 = 16000
12 x 0,1 = 01,2
10 x 0,01= 0,10
46 : 0,1 = 4,6
24 : 0,5 = 48
60 : 0,25 = 24
~~ chưa chắc đã đúng ~~
hok tốt
10 x 1000 = 10000
1600 x 10 = 16000
12 x 0,1 = 1,2
10 x 0,01 = 0,1
46 : 0,1 = 460
24 : 0,5 = 48
60 : 0,25 = 240
chuẩn cmnr
tìm x
X : 0,1 + X x 5 = 24
giúp mk nha ai làm đúng mk cho 1 tick
\(x:0,1+x\times5=24\)
\(\Rightarrow x:\frac{1}{10}+x\times5=24\)
\(\Rightarrow x\times10+x\times5=24\)
\(\Rightarrow x\times\left(10+5\right)=24\)
\(\Rightarrow x\times15=24\)
\(\Rightarrow x=\frac{24}{15}=\frac{8}{5}\)
\(X:0,1+Xx5=24\)
\(\Rightarrow Xx10+Xx15=24\)
\(\Rightarrow Xx\left(10+15\right)=24\)
\(\Rightarrow Xx25=24\)
\(\Rightarrow X=\frac{24}{25}\)
Vậy \(X=\frac{24}{25}\)
Chúc bạn học tốt !!!
X : 0,1 + X * 5 = 24
X * 10 + X * 5 = 24
X * ( 10 + 5 ) = 24
X * 15 = 24
x = 15 : 24
X = 0,625
Mình điền dáu nhân là * nha
\(2^{x+2}\cdot3^{x+1}\cdot5^x=10800\)
\(2^{x+2}\cdot3^{x+1}\cdot5^x=10800\\\Rightarrow2^x\cdot2^2\cdot3^x\cdot3\cdot5^x=10800\\\Rightarrow(2^x\cdot3^x\cdot5^x)\cdot(2^2\cdot3)=10800\\\Rightarrow(2\cdot3\cdot5)^x\cdot(4\cdot3)=10800\\\Rightarrow30^x\cdot12=10800\\\Rightarrow30^x=10800:12\\\Rightarrow30^x=900\\\Rightarrow30^x=30^2\\\Rightarrow x=2\)
\(2^{x+2}.3^{x+1}.5^x=10800\\ \Leftrightarrow2^x.2^2.3^x.3.5^x=10800\\ \Leftrightarrow12.\left(2.3.5\right)^x=10800\\ \Leftrightarrow12.30^x=10800\\ \Leftrightarrow30^x=\dfrac{10800}{12}=900=30^2\\ Vậy:x=2\)
Bài 1: Tìm X, biết:
1) 31,5 . 0,1 + X . 3 = 7,65
2) 3/8 + ( X - 5/24 ) : 2/3 = 1
1) \(31,5\cdot0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
b)\(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)
1. \(31,5.0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
2. \(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{8}.\frac{2}{3}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)