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\(2^2\cdot3\left(x+5\right)-6^2=\left(2^3+2^2\right)\cdot2^2\)
\(\Rightarrow4\cdot\left(3x+15\right)-36=12\cdot4\)
\(\Rightarrow12x+60-36=48\)
\(\Rightarrow12x+24=48\)
\(\Rightarrow12x=24\)
\(\Rightarrow x=24:12=2\)
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`@` `\text {Ans}`
`\downarrow`
`(2^2+1) \times (x+14) = 5^2 \times 4 + (2^5 + 3^2 + 7^2) \div 2`
` \Rightarrow (4+1) \times (x+14) = 5^2\times 2^2 + ( 32 + 9 + 49) \div 2`
`\Rightarrow 5 \times (x+14) = (5*2)^2 + (32+58) \div 2`
`\Rightarrow 5 \times (x+14) = 10^2+90 \div 2`
`\Rightarrow 5 \times (x+14) = 100 + 45`
`\Rightarrow 5 \times (x+14) = 145`
`\Rightarrow x+14 = 145 \div 5`
`\Rightarrow x+14=29`
`\Rightarrow x=29-14`
`\Rightarrow x=15`
Vậy, `x=15.`
\(\left(2^2+1\right)\cdot\left(x+14\right)=5^2\cdot4+\left(2^5+3^2+7^2\right):2\)
\(\Rightarrow\left(4+1\right)\cdot\left(x+14\right)=25\cdot4+\left(32+9+49\right):2\)
\(\Rightarrow5\cdot\left(x+14\right)=100+45\)
\(\Rightarrow5x+70=145\)
\(\Rightarrow5x=75\)
\(\Rightarrow x=\dfrac{75}{5}=15\)
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\(\left(x+6\right)^3=64\)
\(\Leftrightarrow\left(x+6\right)^3=4^3\)
\(\Leftrightarrow x+6=4\)
\(\Leftrightarrow x=-2\)
\(\left(x+6\right)^3=64\)
\(\sqrt[3]{\left(x+6\right)^3}=\sqrt[3]{64}\)
\(x+6=4\)
\(x=-2\)
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b)\(3.4^2-2.3=3.\left(4^2-3\right)\)
\(=3.13\)
\(=39\)
Học tốt nha!!!
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\(a,TH1:x-2021=0=>x=2021\)
\(Th2:x-2022=0=>x=2022\)
Vậy \(x\in\left\{2021;2022\right\}\)
\(b,x\left(8-5\right)=1080\)
\(x.3=1080\)
\(x=360\)
\(c,x^3=216< =>6^3=216=>x=3\)
\(d,5^5=3125\)
a) ( x- 2021) * ( x- 2022) = 0
=> \(\orbr{\begin{cases}x-2021=0\\x-2022=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2021\\x=2022\end{cases}}}\)
b) b. 8x - 5x = 2022
=> 3x = 2022
=> x = 674
c) \(5\cdot x^3=1080\)
=> \(x^3=216\)
=> \(x^3=6^3\)
=> x = 6
d) \(5^x=3125\)
=> \(5^x=5^5\)
=> x = 5
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a)\(51-\left(3+x\right)=26\\ \Leftrightarrow51-3-x=26\\ \Leftrightarrow x=51-3-26\\ \Leftrightarrow x=22\)
b)Ta có:\(Ư_{\left(24\right)}=\left\{1;2;3;4;6;8;12;24\right\}\)
mà x>10⇒x=\(\left\{12;24\right\}\)
c)\(5.2^2-\left(18:3+2021^0\right)=5.4-6=20-6=14\)
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a)\(27.65+27.35+300=27.\left(65+35\right)+300\)
\(=27.100+300=2700+300=3000\)
b)\(3838:\left[\left(190-6.5^2\right):4+3\right]\)
\(=3838:\left[\left(190-6.25\right):4+3\right]\)
\(=3838:\left[\left(190-150\right):4+3\right]\)
\(=3838:\left[40:4+3\right]=3838:\left[10+3\right]\)
\(=3838:13=\dfrac{3838}{13}\)
c)\(2022-x=2021\)
\(x=2022-2021=1\)
d)\(26+14:\left(x-5\right)=33\)
\(14:\left(x-5\right)=33-26=7\)
\(x-5=14+7=2\)
\(x=2+5=7\)
e)đề hỏi làm j thế bạn
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a,320 và 274
320=(35)4=2434>274
Vậy 320>274
b,534 và 25x530
25x530=52x530=532<534
=>534>25x530.
c,224và 266
224=(24)6=166<266
=>224<266
d,1030và 450
1030=(103)10=100010
450=(45)10=102410
Vì 100010<102410nên 1030<450.
e,2300và 3200
2300=(23)100=8100
3200=(32)100=9100
Vì 8100<9100 nên 2300<3200
2021⁰ - 3 mũ x= (-26)
1 - 3x = -26
3x = 1 + 26
3x = 27
3x = 33
=> x = 3
HT và $$$