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a) 135 - 5(x + 4) = 35
<=> 135 - 5x - 20 = 35
<=> 115 - 5x = 35
<=> 5x = 115 - 35
<=> 5x = 80
<=> x = 16
b) 25 + 3 (x - 8) = 106
=> 3 ( x - 8) = 106 - 25
=> 3 ( x - 8) = 81
=> ( x - 8) = 81: 3
=> x - 8 = 27
=> x = 27 + 8
=> x = .......
\(a,\)\(25+3\left(x-8\right)=106.\)
\(\Rightarrow25+3x-24=106\)
\(\Rightarrow3x+1=106\)
\(\Rightarrow3x=105\)\(\Rightarrow x=35\)
\(b,3^2\left(x+4\right)-5^2=5.22\)
\(\Rightarrow9\left(x+4\right)-25=110\)
\(\Rightarrow9x+36-25=110\)
\(\Rightarrow9x+11=110\)
\(\Rightarrow9x=99\Leftrightarrow x=11\)
\(a,25:3\left(x-8\right)=106\)
\(\Rightarrow25+3x-24=106\)
\(\Rightarrow3x+1=106\)
\(\Rightarrow x=35\)
\(b,3^2\left(x+4\right)-5^2=5.22\)
\(\Rightarrow9x+36-25=110\)
=\(9x+11=110\)
\(\Rightarrow9x=99\)
\(\Rightarrow x=11\)
1) \(-\frac{2}{3}\left(x-\frac{1}{4}\right)=\frac{1}{3}\left(2x-1\right)\)
\(-\frac{2}{3}x+\frac{1}{6}=\frac{2}{3}x-\frac{1}{3}\)
\(-\frac{2}{3}x-\frac{2}{3}x=-\frac{1}{3}-\frac{1}{6}\)
\(-\frac{4}{3}x=-\frac{1}{2}\)
\(x=\left(-\frac{1}{2}\right):\left(-\frac{4}{3}\right)\)
\(x=\frac{3}{8}\)
a) 25 + 3 . ( x - 7 ) = 106
3 . ( x - 7 ) = 106 -25
3 . ( x - 7 ) = 81
( x - 7 ) = 81 : 3
x - 7 = 27
x = 27 + 7
x = 34
b) 32 . ( x + 4 ) - 52 = 5. 22
32 . ( x + 4 ) - 52 = 20
32 . ( x + 4 ) = 20 + 52
32 . ( x + 4 ) = 45
( x + 4 ) = 45 : 32
( x + 4 ) = 5
x = 5 - 4
x = 1
c) 4 . ( x - 3 ) = 72 - 110
4 . ( x - 3 ) = 48
( x - 3 ) = 48 : 4
x - 3 = 12
x = 12 + 3
x = 15
tk cho mk nha
a) 25 + 3 . ( x - 7 ) =106
3 . ( x - 7 ) = 106 - 25
3 . ( x -7 ) =81
x - 7 = 81 :3
x - 7 = 27
x = 27 - 7
x =20
b) 9 . ( x+ 4 ) - 25 = 5.4
9 . ( x + 4 ) - 25 = 20
9 . (x + 4 ) = 25 + 20
9 . ( x + 4 ) = 45
x + 4 = 45 :9
x +4 = 5
x = 5 -4
x = 1
c) 4. ( x - 3 ) = 49 -1
4 . ( x - 3 ) = 48
x - 3 = 48 : 4
x -3 =24
x = 24 + 3
x = 27
\(3^2.\left(x+4\right)-5^2=5.2^2\)
= \(9.\left(x+4\right)-25=5.4\)
= \(9.\left(x+4\right)-25=20\)
= \(9.\left(x+4\right)=20+25\)
= \(9.\left(x+4\right)=45\)
\(\left(x+4\right)=45:9\)
\(x+4=5\)
\(x=5-4\)
\(x=1\)
32.(x+4)-52=5.22
32.(x+4)=52+(5.22)
32.(x+4)=45
x+4=45:32
x+4=5
x=5-4
x=1
7x-x=521:519+3.22-70
=> 6x = 5^2 + 12 -1
=> 6x = 36
=> x = 36/6 = 6
Kết quả 6
Học tốt
a) 2(x-51) = 2^0.2^4 + 5.2^2
2(x-51) = 2^2(2^2+5)
2(x-51) = 36
x-51 = 18
x = 69
Vậy: x = 69
b) 225 : (x-19) = 25
x-19 = 9
x = 28
Vậy: x = 28
c) 4. (x-3)= 7^2-1^0
4. (x-3)= 48
x-3 = 12
x = 15
Vậy: x = 15
d) 3^3(x+4) - 3.5^2= 15.2^2
27 (x+4) - 75 = 60
27 (x+4) = 135
x+4 = 5
x = 1
Vậy: x = 1
e) 2x-7^2 = 5.3^2
2x - 49 = 45
2x = 94
x = 47
Vậy: x = 47
f) 2^3.5^2-(2x+6) = 4^3
200 - 2x - 6 = 64
194 - 2x = 64
2x = 130
x = 65
Vậy: x = 65
g) 135 - 5(x+4) = 35
5(x+4) = 100
x + 4 = 20
x = 16
Vậy: x = 16
h) 75 + 9(x-8) = 318
9(x-8) = 243
x-8 = 27
x = 35
Vậy: x = 35
25+3(x-8)=106
25+3x-24=106
3x=106-25+24
3x=105
x=105/3
x=35
Vậy x=35
\(3^2\left(x+4\right)-5^2=5.2^2\)
\(9\left(x+4\right)-25=20\)
\(9x+36-25=20\)
\(9x=20-36+25\)
\(9x=9\)
\(x=1\)
Vậy x=1
25+3(x-8)=106
3(x-8)=106-25
3(x-8)=81
x-8=81:3
x-8=27
x=27+8
x=35
Bài 2
3^2(x+4)-5^2=5.2^2
9(x+4)-25=5.4
9(x+4)-25=20
9(x+4)=25+20
9(x+4)=45
x+4=45:9
x+4=5
x=5-4
x=1
Nếu saj cko mjk xl nke!