![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,12\left(x-1\right)=0\\ x-1=0\\ x=1\\ b,45+5\left(x-3\right)=70\\ 5\left(x-3\right)=25\\ x-3=5\\ x=8\\ c,3.x-18:2=12\\ 3.x-9=12\\ 3.x=21\\ x=7\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2^3x+5^2x=2.\left(5^2+2^3\right)-33\)
\(8x+25x=2.\left(25+8\right)-33\)
\(8x+25x=2.33-33\)
\(8x+25x=66-33\)
\(8x+25x=33\)
\(x+\left(8+25\right)=33\)
\(x+33=33\)
\(x=0\)
\(15:\left(x+2\right)=\left(3^3+3\right):10\)
\(15:\left(x+2\right)=\left(27+3\right):10\)
\(15:\left(x+2\right)=30:10\)
\(15:\left(x+2\right)=3\)
\(x+2=15:3\)
\(x+2=5\)
\(x=3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: -3/4x12=-36/4=-9
b: \(=\dfrac{7}{15}\cdot\dfrac{10}{21}=\dfrac{7}{21}\cdot\dfrac{10}{15}=\dfrac{1}{3}\cdot\dfrac{2}{3}=\dfrac{2}{9}\)
c: \(=\dfrac{7}{18}\cdot\dfrac{12}{21}=\dfrac{12}{18}\cdot\dfrac{7}{21}=\dfrac{2}{3}\cdot\dfrac{1}{3}=\dfrac{2}{9}\)
d: \(=\dfrac{11}{15}\cdot\dfrac{5}{22}=\dfrac{11}{22}\cdot\dfrac{5}{15}=\dfrac{1}{2}\cdot\dfrac{1}{3}=\dfrac{1}{6}\)
e: \(=-\dfrac{8}{15}\cdot\dfrac{5}{4}=\dfrac{-40}{60}=\dfrac{-2}{3}\)
f: \(=-15\cdot\dfrac{3}{5}=-9\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2 x 18 x 14 + 3 x 17 x 12 + 4 x 69 x 9
= { 2 x 18 } x 14 + { 12 x 3 } x 17 + { 4 x 9 } x 69
= 36 x 14 + 36 x 17 + 36 x 69
= 36 x { 14 + 17 + 69 }
= 36 x 100
= 3600
2 × 18 × 14 + 3 × 17 × 12 + 4 × 69 × 9
= 2 × 18 × 14 + 3 × 12 × 17 + 4 × 9 × 69
= 36 × 14 + 36 × 17 + 36 × 69
= 36 × (14 + 17 + 69)
= 36 × 100
= 3600
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5^{10}:5^8+x=3^{20}:\left(-3\right)^{18}-2^{35}:\left(-2\right)^{33}\\ \Leftrightarrow5^2+x=3^2+\left(-2\right)^2\\ \Leftrightarrow25+x=13\\ \Leftrightarrow x=-12\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
96 - 3( x + 1 ) = 42
3( x + 1 ) = 96 - 42
3( x + 1 ) = 54
x + 1 = 54 : 3 = 18
x = 18 - 1
x = 17
cau 1
96-3(x+1)=42
=> 3(x-1)=54
=> x-1=18
=> x=19
cau 2
12x-33=32.33
=> 12x-33=243
=> 12x=276
=> x=23
=>12x-33=3^5
=>12x=276
=>x=23
12x-33=9.27
12x-33=243
12x=243+33
12x=276
x=276:12
x=23