Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Đặt \(A=\frac{2,75-2,2+\frac{11}{7}+\frac{11}{13}}{0,75-0,6+\frac{3}{7}+\frac{11}{13}}-x-\frac{1}{9}=\frac{2}{3}+\frac{2}{15}\frac{2}{35}+\frac{2}{63}\)
\(\Rightarrow A=\frac{0,55+\frac{11}{7}+\frac{11}{13}}{0,15+\frac{3}{7}+\frac{11}{13}}-x-\frac{1}{9}=\frac{42}{63}+\frac{14}{105}+\frac{6}{105}+\frac{2}{63}\)
\(\Rightarrow A=\frac{\frac{11}{20}+\frac{11}{7}+\frac{11}{13}}{\frac{3}{20}+\frac{3}{7}+\frac{11}{13}}-x-\frac{1}{9}=\frac{44}{63}+\frac{20}{105}\)
\(\Rightarrow A=\frac{\frac{1001}{1820}+\frac{2860}{1820}+\frac{1540}{1820}}{\frac{273}{1820}+\frac{780}{1820}+\frac{1540}{1820}}-x-\frac{1}{9}=\frac{44}{63}+\frac{4}{21}\)
\(\Rightarrow A=\frac{\frac{5401}{1820}}{\frac{2593}{1820}}-x-\frac{1}{9}=\frac{44}{63}+\frac{12}{63}\)
\(\Rightarrow A=\frac{5401}{1820}:\frac{2593}{1820}-x-\frac{1}{9}=\frac{56}{63}\)
\(\Rightarrow A=\frac{5401}{1820}.\frac{1820}{2593}-x-\frac{1}{9}=\frac{8}{9}\)
\(\Rightarrow A=\frac{5401}{2593}-x-\frac{1}{9}=\frac{8}{9}\)
\(\Rightarrow\frac{5401}{2593}-x=\frac{8}{9}+\frac{1}{9}\)
\(\Rightarrow\frac{5401}{2593}-x=1\)
\(\Rightarrow x=\frac{5401}{2593}-1\)
\(\Rightarrow x=\frac{2808}{2593}\)
Vậy \(x=\frac{2808}{2593}\)
Chúc bn học tốt
a)\(\frac{11^4.6-11^5}{11^4-11^5}:\frac{9^8.3-9^9}{9^8.5+9^8.7}\)
\(=1.6:\frac{9^8.3-9^8.9}{9^8.\left(5+7\right)}\)
\(=6:\frac{9^8.\left(3-9\right)}{9^8.12}\)
\(=6:\frac{9^8.\left(-6\right)}{9^8.12}\)
\(=6:\left(-\frac{6}{12}\right)\)
\(=6:\left(-\frac{1}{2}\right)\)
\(=-12\)
b) 3/5 : ( -1/5-1/6)+3/5:(-1/3-16/15) ( mình chuyển về ps luôn )
=3/5: (-11/30) + 3/5 : (-7/5)
=3/5:[-11/30+(-7/5)]
=3/5:53/30
=18/53
c) (1/2-13/14):5/7-(-2/21+1/7):5/7
= -3/7:5/7-1/21:5/7
=(-3/7-1/21):5/7
=-10/21:5/7
=-2/3
câu b vá c mình làm tắt nha. chúc bạn học tốt