\(2x+5.11^0=3^2\)

\(\Rightarrow2x+5.1=9\)

\(\Rightarrow2x+5=9\)

\(\Rightarrow2x=9-5\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=4:2\)

\(\Rightarrow x=2\)

Vậy \(x=2\)

b) \(4\left(3x-13\right)=64:2^3\)

\(\Rightarrow4\left(3x-13\right)=64:8\)

\(\Rightarrow4\left(3x-13\right)=8\)

\(\Rightarrow3x-13=8:4\)

\(\Rightarrow3x-13=2\)

\(\Rightarrow3x=2+13\)

\(\Rightarrow3x=15\)

\(\Rightarrow x=15:3\)

\(\Rightarrow x=5\)

Vậy \(x=5\)

1. Ta có: 2x + 5.11^0 = 3^2

=> 2x + 5.1 = 9

=> 2x + 5 = 9

=> 2x = 9 - 5 = 4

=> x = 4 : 2 = 2

Vậy x = 2

2. Ta có: 4. ( 3x - 13 ) = 64 : 2^3

=> 4. ( 3x - 13 ) = 64 : 8 = 8

=> 3x - 13 = 8 : 4 = 2

=> 3x = 2 + 13 = 15

=> x = 15 : 3 = 5

Vậy x =5

Chúc bạn học tốt! ~

a)

\(2x+5.11^0=3^2\)

<=>\(2x+5.1=3^2\)

<=> \(2x=9-5\)

<=> \(2x=4\)

<=> \(x=2\)

Vậy x=2

b)

\(4.\left(3x-13\right)=\dfrac{64}{2^3}\)

<=> \(4\left(3x-13\right)=\dfrac{64}{8}\)

<=> \(4.\left(3x-13\right)=8\)

<=> \(3x-13=2\)

<=> \(3x=15\)

<=> \(x=5\)

Vậy x=5

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Bài 2:

a) \(\left(3x+2\right)^3=-64\)

\(\Leftrightarrow\left(3x+2\right)^3=\left(-4\right)^3\)

\(\Leftrightarrow3x+2=\left(-4\right)\)

\(\Leftrightarrow3x=-4-2\)

\(\Leftrightarrow3x=-6\)

\(\Leftrightarrow x=-2\)

b) \(2x-3=-33\)

\(\Leftrightarrow2x=-33+3\)

\(\Leftrightarrow2x=-30\)

\(\Leftrightarrow x=-15\)

Bạn kia mất dạy quá

giải i mn huhu pls

cần dc giải mai tui họccc

\(60+x-34=43\Rightarrow x=43+34-60=17\)

\(23x-6.23+69x=230\)

\(\Rightarrow23x+69x=230+6.23\)

\(\Rightarrow92x=368\Rightarrow x=368:92\Rightarrow x=4\)

\(\left(15.24-x\right):0,25=100:0,25\)

\(\Rightarrow\left(360-x\right)=100:0,25.0,25\)

\(\Rightarrow360-x=100\Rightarrow x=360-100=260\)

\(\left(7x+8\right):5=10\Rightarrow\left(7x+8\right)=10.5\)

\(\Rightarrow7x+8=50\Rightarrow7x=50-8\Rightarrow7x=42\Rightarrow x=42:7=6\)

\(280:\left(7+3x\right)=4\Rightarrow\left(7+3x\right)=280:4\)

\(\Rightarrow7+3x=70\Rightarrow3x=70-7\Rightarrow3x=63\Rightarrow x=63:3=21\)

\(\left(x+5\right)x19:13=57\)

\(\Rightarrow\left(x+5\right)x19=57.13\)

\(\Rightarrow\left(x+5\right)=741:19\Rightarrow x+5=39\Rightarrow x=39-5=34\)

\(4\left(36-4x\right)=64\)

\(\Rightarrow\left(36-4x\right)=64:4\)

\(\Rightarrow36-4x=16\)

\(\Rightarrow4x=36-16\Rightarrow4x=20\Rightarrow x=20:4=5\)

\(\left(7,6:1,9\right)x=3,2\)

\(\Rightarrow4x=3,2\Rightarrow x=3,2:4=0,8\)

\(\left(x:2+50\right):5=12\)

\(\Rightarrow x:2+50=12.5\)

\(\Rightarrow x:2=60-50\Rightarrow x:2=10\Rightarrow x=10.2=20\)

cứu tui

`#3107.101107`

a)

\(5\left(x-1\right)^3=40\\\Rightarrow\left(x-1\right)^3=40\div5\\ \Rightarrow\left(x-1\right)^3=8\\ \Rightarrow\left(x-1\right)^3=2^3\\ \Rightarrow x-1=2\\ \Rightarrow x=2+1\\ \Rightarrow x=3\)

Vậy, `x = 3`

b)

\(3^{2x+1}+9^x=324?\\ \Rightarrow3^{2x}\cdot3+3^{2x}=324\\ \Rightarrow3^{2x}\cdot\left(3+1\right)=324\\ \Rightarrow3^{2x}\cdot4=324\\ \Rightarrow3^{2x}=81\\ \Rightarrow3^{2x}=3^4\\ \Rightarrow2x=4\\ \Rightarrow x=2\)

Vậy, `x = 2`

c)

\(5^x-13=3\cdot2^2\\ \Rightarrow5^x-13=12\\ \Rightarrow5^x=12+13\\ \Rightarrow5^x=25\\ \Rightarrow5^x=5^2\\ \Rightarrow x=2\)

Vậy, `x = 2`

d)

\(8^x+2^{3x+1}=192\\ \Rightarrow2^{3x}+2^{3x}\cdot2=192\\ \Rightarrow2^{3x}\left(1+2\right)=192\\ \Rightarrow2^{3x}\cdot3=192\\ \Rightarrow2^{3x}=64\\ \Rightarrow2^{3x}=2^6\\ \Rightarrow3x=6\\ \Rightarrow x=2\)

Vậy, `x = 2.`

a) -x+18-4x-64-16=-x-4x+18-64-16=-5x-62

b) x+36+4+2x+24=x+2x+36+4+24=3x+64

c) x-23+13+2x-17+57=x+2x-23+13-17+57=3x+29

Tick nha

đơn giản biểu thức là sao

Phá ngoặc rồi làm thôi ! há há

13 355 - 9 324 = 4031

23 216 + 12 452 = 35668

1477 + 2 119 = 3596

62 102 - 23 701 = 38401