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x(24-32)=145-5
\(\Leftrightarrow\)7x=140
\(\Leftrightarrow\)x=20
5(x+35)-200=288-93
\(\Leftrightarrow\)5(x+35)=288+200-93=395
\(\Leftrightarrow\)x+35=79
\(\Leftrightarrow\)x=44
a, Lời giải
\(x\left(2^4-3^2\right)=145-5\)
\(\Leftrightarrow7x=140\)
\(\Leftrightarrow x=140:7\)
\(\Rightarrow x=20\)
b, Lời giải
\(5\left(x+35\right)-200=288-93\)
\(\Leftrightarrow5\left(x+35\right)=395\)
\(\Leftrightarrow x+35=395:5\)
\(\Leftrightarrow x+35=79\)
\(\Leftrightarrow x=79-35\)
\(\Rightarrow x=44\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(2^4.x-3^2.x=145-\frac{255}{51}\Rightarrow x.\left(2^4-3^2\right)=145-5\)
\(\Rightarrow7.x=140\Rightarrow x=20\)
b) \(\frac{580}{x-24}=329-150.2\Rightarrow\frac{580}{x-24}=329-300\Rightarrow\frac{580}{x-24}=29\Rightarrow x-24=20\)
\(\Rightarrow x=44\)
c) \(7.\left(x-14\right)+35=25+\frac{279}{9}\Rightarrow7.\left(x-14\right)=25+31-35\)
\(\Rightarrow7.\left(x-14\right)=21\Rightarrow x-14=3\Rightarrow x=17\)
![](https://rs.olm.vn/images/avt/0.png?1311)
24.x-32.x=145-255:51
16.x-9.x=145-5
16.x-9.x=140
x.(16-9)=140
x.7=140
x=140:7
x=20
580:(x-24)=329-150:2=ko bít
7.(x-4)+35=25+279:9
7.(x-4)+35=25+31
7.(x-4)+35=56
7.(x-4)=56-35
7.(x-4)=21
x-4=21:7
x-4=3
x=3+4
x=7
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hộ
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![](https://rs.olm.vn/images/avt/0.png?1311)
a)24.x -32.x =145-255:51
x . (24 - 32) = 145 - 5
x . (32 - 9) = 140
x . 23 = 140
x = 140 : 23
x = ????
b)580 : ( x -24)=329-150* 21
580 : (x - 24) = 329 - 300
580 : (x - 24) = 29
x - 24 = 580 : 29
x - 24 = 20
x = 20 + 24
x = 44
c) 4x + 4x+1 + 4x+3=1136
4x + 4x .41 + 4x .43 = 1136
4x . ( 1 + 4 + 43) = 1136
4x . 64 = 1136
4x = 1136 : 64
![](https://rs.olm.vn/images/avt/0.png?1311)
`12^4 .x-3.x=145-225:51`
`=>20736x-3x=145-75/17`
`=>20733x=2390/17`
`=>x=2390/17:20733`
`=>x=2390/352461`
2^4 .x - 3^2 .x = 145 - 255 : 51
16.x - 9.x = 145 - 5
16.x - 9.x = 140
(16 - 9).x = 140
7x = 140
x = 140 : 7
x = 20
2^4 .x - 3^2 .x = 145 - 255 : 51
8x - 9x = 145 - 5
-x = 140
x = -140