8n+2.23=85
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\(\Leftrightarrow2^{3n+6}\cdot2^3=2^{15}\)
=>\(2^{3n+6}=2^{12}\)
=>3n+6=12
=>3n=6
=>n=2
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==> 4n + 7 +4n +7 +61/4n + 7
= 61/4n + 7
==> 4n+1e Ư(61)
Uc(61) = { -1; 1; 61; -61}
vậy n là -1.5;-2;13.5;17.
==> 4n + 7 +4n +7 +61/4n + 7
= 2/1 + 61/4n + 7
==> 4n+1e Ư(61)
Uc(61) = { -1; 1; 61; -61}
vậy n là -1.5;-2;13.5;17.
mình nhần nha
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\(=2\cdot8+\dfrac{34}{9}=16+\dfrac{34}{9}=\dfrac{178}{9}\)
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a) 2(x-51)=2.23+20 b)32(x+4)-52=5.52
2(x-51)=2.8+20 9(x+4)-25=125
2(x-51)=36 9(x+4)=125+25
x-51=36:2 9(x+4)=150
x-51=18 x+4= 150:9
x=18+51 x+4=50/9
x=69 x=14/9
Vậy:x=69 Vậy:x=14/9
Mik sai thì thôi nha!!!!
a) 2(x-51)=2.23+20 b)32(x+4)-52=5.52
2(x-51)=2.8+20 9(x+4)-25=125
2(x-51)=36 9(x+4)=125+25
x-51=36:2 9(x+4)=150
x-51=18 x+4= 150:9
x=18+51 x+4=50/9
x=69 x=4/9
Vậy:x=69 Vậy:x=4/9
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.5 + 6 = 7,5
2.23 + 65 = 67,23
3,43 + 8 = 11,43
4,49 + 28 = 32,49
\(8^{n+2}\cdot2^3=8^5\)
\(2^{3n+6}\cdot2^3=2^{15}\)
\(3n+6=12\)
\(3n=6\)
\(n=2\)
\(8^{n+2}\cdot2^3=8^5\\\Rightarrow 8^{n+2}\cdot8=8^5\\\Rightarrow 8^{n+3}=8^5\\\Rightarrow n+3=5\\\Rightarrow n=5-3\\\Rightarrow n=2\)