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\(a,25+3\left(x-8\right)=106\\ 3\left(x-8\right)=81\\ x-8=27\\ x=35\)
\(102+\left(26-3.x\right):5=106\)
\(\left(26-3x\right):5=106-102=4\)
\(26-3x=4.5=20\)
\(3x=26-20=6\)
\(x=6:3=2\)
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!
\(135-5\cdot\left(x+4\right)=35\)
\(5\cdot\left(x+4\right)=135-35\)
\(5\cdot\left(x+4\right)=100\)
\(x+4=100:5\)
\(x+4=20\)
\(x=20-4\)
\(x=16\)
b) \(25+3\cdot\left(x-8\right)=106\)
\(3\cdot\left(x-8\right)=106-25\)
\(3\cdot\left(x-8\right)=81\)
\(x-8=81:3\)
\(x-8=27\)
\(x=27+8\)
\(x=35\)
c) \(3^2\cdot\left(x+4\right)-5^2=5\cdot2^2\)
\(9\cdot\left(x+4\right)-25=5\cdot4\)
\(9\cdot\left(x+4\right)-25=20\)
\(9\cdot\left(x+4\right)=20+25\)
\(9\cdot\left(x+4\right)=45\)
\(x+4=45:9\)
\(x+4=5\)
\(x=5-4\)
\(x=1\)
Chúc bạn học tốt!!!!!!!!!!!!!!!!!!!!
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)\(5.2^2-\left(18:3+2021^0\right)=5.4-6=20-6=14\)
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 = .......
m, 2(x-51)=2.2^3+20
2(x-51)=2.6+20
2(x-51)=32
x-51=32:2
x-51=16
x =16+51
x =67
n, 450:(x-19)=50
x-19 =450:50
x-19 =9
x =9+19
x =28
o, 4(x-3)=7^2-1^10
4(x-3)=49-1
4(x-3)=48
x-3 =48:4
x-3 =12
x =12+3
x =15
p, 135-5(x+4)=35
5(x+4) =135-35
5(x+4) =100
x+4 =100:5
x+4 =20
x =20-4
x =16
q, 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
r, 3^2(x+4)-5^2=5.2^2
9(x+4)-25=20
9(x+4) =20+25
9(x+4) =45
x+4 = 45:9
x+4 =5
x =5-4
x =1
p, 135 - 5(x+4) = 35
⇒ 5(x+4) = 135 - 35
⇒ 5(x+4) = 100
x + 4 = 100 : 5
x + 4 = 20
x = 20 - 4
x = 16
Vậy : x=16
1/5.2^x+1/3.2^x.2=1/5.2^7+1/3.2^7.2
2x(1/5+1/3.2)=2^7(1/5+1/3.2)
=>2^x=2^7
=> x=7
x=ln(78)/ln(5.2)
26 + 5.2x + 2 = 106
5.2x + 2 = 106 -26
5.2x + 2 = 80
2x + 2 = 80 : 5
2x + 2 = 16
2x + 2 = 24
⇒ x + 2 = 4
⇒ x = 4 - 2
⇒ x = 2