Muối nén và muối xổi khác nhau như thế nào?

\(a,2\dfrac{2}{3}x+3\dfrac{3}{4}x=\dfrac{385}{24}\)

\(x.\left(\dfrac{8}{3}+\dfrac{15}{4}\right)=\dfrac{385}{24}\)

\(x.\dfrac{77}{12}=\dfrac{385}{24}=>x=\dfrac{5}{2}\)

\(b,-2\dfrac{2}{3}:x=1\dfrac{7}{9}:0,8\)

\(\dfrac{-8}{3}:x=\dfrac{20}{9}=>x=\dfrac{-6}{5}\)

\(c,140\%+\dfrac{5}{3}x+2x=2280\)

\(\dfrac{7}{5}+x.\left(\dfrac{5}{3}+2\right)=2280\)

\(x.\dfrac{11}{3}=\dfrac{11393}{5}\)=>\(x=\dfrac{34179}{55}\)

\(d,-3\dfrac{1}{3}.\left|x\right|=1\dfrac{1}{2}-2\dfrac{2}{3}\)

\(\dfrac{-10}{3}.\left|x\right|=\dfrac{3}{2}-\dfrac{8}{3}\)

\(\dfrac{-10}{3}.\left|x\right|=\dfrac{-7}{6}\)

\(\left|x\right|=\dfrac{7}{20}=>x=\dfrac{7}{20};x=\dfrac{-7}{20}\)

Có chỗ nào sai thì thông cảm cho mình nha, chúc bạn học giỏi

b, B = 1 + 2 + 2^2 + 2^3 +.....+ 2^2013

2B = 2.(1 + 2 + 2^2 + 2^3 +.....+ 2^2013)

2B = 2 + 2^2 + 2^3 + 2^4 +.....+ 2^2014

2B - B = 2^2014 - 1

B = 2^2014 - 1

\(A=\dfrac{1}{2}.\left(1-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{7}+...+\dfrac{1}{99}-\dfrac{1}{101}\right)\)

\(A=\dfrac{1}{2}.\dfrac{100}{101}\)

\(A=\dfrac{50}{101}\)

Bạn xem Sách bài tập toán 6 tập 2 trang 24 bài 9.3b; 9.4; 9.5; 9.6 sẽ có

Nhớ tick cho mình nha

dễ

\(\left(\dfrac{3}{4}:\dfrac{2}{3}\right):\dfrac{3}{5}=\left(\dfrac{3}{4}.\dfrac{3}{2}\right).\dfrac{5}{3}=\dfrac{3}{4}.\dfrac{5}{3}.\dfrac{3}{2}=\dfrac{5}{4}.\dfrac{3}{2}=\dfrac{15}{8}\)