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12x-33=32.33
12x-33=32+3
12x-33=35
12x-33=243
12x=243+33
12x=276
x=276:12
x=23
tk nhé
12x - 33 = 3^2 x 3^3
12x - 33 = 3^2+3
12x - 33 = 3^5
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
Trả lời
96-3.(x+1)=42
3.(x+1)=96-42
3.(x+1)=54
x+1 =54:3
x+1 =18
x =18-1
x =17
12x-33=32.33
12x-33=35
12x =243+33
12x =276
x =276:12
x =23.
Rất vui khi được giúp bạn !
96-3.(x+1)=42
3.(x+1)=96-42
3.(x+1)=54
x+1=54:3
x+1=18
x =18-1
x =17
12x-33=32.33
12x-33=243
12x =243+33
12x =276
x =276:12
x=23
\(A=2019\times2021=\left(2021-1\right)\times\left(2021+1\right)=2021^2-1< 2021^2=B.\)
2x . 4 = 128
2x = 128 : 4
2x = 32
2x = 25
x = 5
2 . x + 33 . 3 = 75 : 73
2 . x + 27 . 3 = 72
2 . x + 81 = 49
Hình như đề sai nha bạn
12x - 33 = 32017 : 32015
12x - 33 = 32
12x - 33 = 9
12x = 9 + 33
12x = 42
x = 42 : 12
x = 3,5
a) \(2021^{2020}-2021^{2019}=2021^{2019}.\left(2021-1\right)=2021^{2019}.2020\)
b) Ta có :\(7x-140=3.7^2\)
\(\implies\) \(7x-140=3.49\)
\(\implies\) \(7x-140=147\)
\(\implies\) \(7x=287\)
\(\implies\) \(x=41\)
\(96-3\times\left(x+1\right)=\)\(42\)
\(\Rightarrow3\times\left(x+1\right)=96-42=54\)
\(\Rightarrow x+1=54:3=18\)
\(\Rightarrow x=18-1=17\)
\(12x-33=3^2\times3^3\)
\(\Rightarrow12x-33=3^5=243\)
\(\Rightarrow12x=243+33=276\)
\(\Rightarrow x=276:12=23\)
a) \(M=2020+2020^2+...+2020^{10}\)
\(M=\left(2020+2020^2\right)+\left(2020^3+2020^4\right)+...+\left(2020^9+2020^{10}\right)\)
\(M=2020\left(1+2020\right)+2020^3\left(1+2020\right)+...+2020^9\left(1+2020\right)\)
\(M=2021\left(2020+2020^3+...+2020^9\right)⋮2021\).
b) Bạn làm tương tự câu a).
b, \(A=2021+2021^2+...+2021^{2020}\)
\(=2021\left(1+2021\right)+...+2021^{2019}\left(1+2021\right)\)
\(=2022\left(2021+...+2021^{2019}\right)⋮2022\)
Vậy ta có đpcm
c) \(M=\frac{2019}{2020}+\frac{2020}{2021}\) và \(N=\frac{2019+2020}{2020+2021}\)
Ta có \(\frac{2019}{2020}>\frac{2019}{2020+2021}\)
\(\frac{2020}{2021}>\frac{2020}{2020+2021}\)
\(\Rightarrow\frac{2019}{2020}+\frac{2020}{2021}< \frac{2019+2020}{2020+2021}=N\)
\(\Rightarrow M>N\)
\(\Rightarrow12x-33=3\\ \Rightarrow12x=36\\ \Rightarrow x=3\)
x:{12--33 }=100000000000000000000000000000