g)
2(x-51)=2.23 + 20
<=> 2(x-51) = 36
=> x- 51 = 36 : 2 = 18
=> x = 18 + 51 = 69
h)
450 : (x-19 ) = 50
<=>
x-19 = 450 : 50 = 9
=> x = 9+19 = 28
i).
4(x-3)=72 -110
4(x-3) = 49 - 1 = 48
= > x- 3 = 48:4 = 12
=> x = 12 + 3=15
`2.(x - 51) = 2.2^3 + 20`
`2.( x - 51) = 2^4 + 20`
`2.(x -51) = 16 + 20`
`2.(x-51) = 36`
`x - 51 = 36 : 2`
`x - 51 = 18`
`x = 18 + 51`
`x = 69`
______________________________________
`450 : ( x - 19) = 50`
`x - 19 = 450 : 50`
`x - 19 =9`
`x =9 + 19`
`x = 28`
__________________________________________
`4.(x -3) = 7^2 - 10^10`
`4.(x -3) = 49 - 1`
`4.(x-3) = 48`
`x - 3 = 48 : 4`
`x - 3 = 12`
`x = 12 + 3`
`x = 15`
_________________________________________
`#BaoL i nh`
Lần sau chụp có tâm xíu đi ạ!
`2.(x - 51) = 2.2^3 + 20`
`2.(x -51) = 16 + 20`
`2.(x-51) = 36`
`x - 51 = 36 : 2`
`x - 51 = 18`
`x = 69`
________________________
`450 : ( x - 19) = 50`
`x - 19 = 450 : 50`
`x - 19 =9`
`x =9 + 19`
`x = 28`
______________________________
`4.(x -3) = 7^2 - 10^10`
`4.(x-3) = 48`
`x - 3 = 48 : 4`
`x - 3 = 12`
`x = 12 + 3`
`x = 15`
p) \(135-5\left(x+4\right)=35\Leftrightarrow135-35-5x-20=0\Leftrightarrow80-5x=0\Leftrightarrow-5x=-80\Leftrightarrow x=16\)
q) \(25+3\left(x-8\right)=106\Leftrightarrow3x-24=106-25\Leftrightarrow3x=81+24\Leftrightarrow3x=105\Leftrightarrow x=35\)
r) \(3^2\left(x+4\right)-5^2=5.2^2\Leftrightarrow9\left(x+4\right)-25=5.4\Leftrightarrow9\left(x+4\right)=20+25\Leftrightarrow9\left(x+4\right)=45\Leftrightarrow x+4=5\Leftrightarrow x=1\)
ko ghi lại đề
g/
→2x-102=2.8+20
2x-102=16+20
2x-102=36
2x=36+102
2x=138
x=138:2
x=69
h/
x-19=450:50
x-19=9
x=19+9
x=28
i/
→4x-12=49-1
4x-12=48
4x=48+12
4x=60
x=60:4
x=15
p/
→135-(5x+20)=35
→135-5x-20=35
-5x=35-135+20
-5x=-80
-x=-80:5
-x=-16
→x=16
q/
25+3x-24=106
3x=106-25+24
3x=105
x=35
r/
→9(x+4)-25=5.4
→9x+36 -25=20
9x=20-36+25
9x=9
→x=1
