
\(x\cdot\frac{6}{25}=\frac{15}{-13}\)
2, \...">
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời. \(x\times\frac{6}{25}=\frac{15}{-13}\) x=\(\frac{15}{-13}\div\frac{6}{25}\) x=\(-\frac{125}{26}\) các câu còn lại làm tương tự nha!!! \(1.x.\frac{6}{25}=\frac{15}{-13}\\
x=\frac{15}{-13}:\frac{6}{25}\\
x=-\frac{125}{26}\) \(2.x:\frac{4}{10}=\frac{13}{-45}+\frac{8}{15}\\
x:\frac{4}{10}=\frac{11}{45}\\
x=\frac{11}{45}.\frac{4}{10}\\
x=\frac{22}{225}\) \(3.\frac{3}{8}-\frac{1}{6}.x=\frac{1}{4}\\
\frac{1}{6}.x=\frac{3}{8}-\frac{1}{4}\\
\frac{1}{6}.x=\frac{1}{8}\\
x=\frac{1}{8}:\frac{1}{6}\\
x=\frac{3}{4}\) \(4.\frac{1}{3}+\frac{1}{2}:x=-4\\
\frac{1}{2}:x=-4-\frac{1}{3}=-\frac{13}{3}\\
x=\frac{1}{2}:\left(-\frac{13}{3}\right)=-\frac{3}{26}\) \(5.x+\frac{7}{12}=\frac{17}{18}-\frac{1}{9}=\frac{5}{6}\\
x=\frac{5}{6}-\frac{7}{12}\\
x=\frac{1}{4}\) 1. \(x=\frac{61}{42}\) 2. \(x=\frac{-36}{5}\) 3. \(x=\frac{13}{11}\) 4. \(x=\frac{1}{12}\) 5.\(x=\frac{-5}{2}\) \(1,\)\(x-\frac{3}{5}=\frac{3}{35}-\frac{-7}{6}\) \(x-\frac{3}{5}=\frac{3}{35}+\frac{7}{6}\) \(x-\frac{3}{5}=\frac{263}{210}\) \(x=\frac{263}{210}+\frac{3}{5}\) \(x=\frac{389}{210}\) VẬY: \(x=\frac{389}{210}\) a)\(\left(4\frac{5}{37}-3\frac45+8\frac{15}{29}\right)-\left(3\frac{5}{57}-6\frac{14}{29}\right)\) =\(4\frac{5}{37}-3\frac45+8\frac{15}{29}-3\frac{5}{37}+6\frac{14}{29}\) =\(\left(4\frac{5}{37}-3\frac{5}{37}\right)+\left(8\frac{15}{29}+6\frac{14}{29}\right)-3\frac45\) =\(\left\lbrack\left(4-3\right)+\left(\frac{5}{37}-\frac{5}{37}\right)\right\rbrack+\left\lbrack\left(8+6\right)+\left(\frac{15}{29}\right.\right.\)+\(\frac{14}{29})\) -\(\frac{19}{5}\) =\(1+0+14+1-\frac{19}{5}\) =\(15+1-\frac{19}{5}\) =\(16-\frac{19}{5}\) =\(\frac{80}{5}-\frac{19}{5}\) =\(\frac{61}{5}\) \(\frac{19}{37}+\left(1-\frac{19}{37}\right)\) \(=\frac{19}{37}+1-\frac{19}{37}\) \(=0+1=1\) Ta có: \(\left(\right. \frac{13 \frac{2}{9} - 15 \frac{2}{3}}{18 \frac{3}{7} - 17 \frac{1}{4}} \cdot \frac{30^{2} - 5^{4}}{25 - 12 \cdot 5^{2}} \left.\right) \cdot x = \frac{\frac{2}{11} + \frac{3}{13} + \frac{4}{15} + \frac{5}{17}}{4 \frac{1}{11} + \frac{5}{13} + \frac{9}{15} + \frac{13}{17}}\) Bước 1: Đổi hỗn số về phân số Bước 2: Tính toán từng phần Ta có: \(\frac{119}{9} - \frac{47}{3} = \frac{119 - 141}{9} = \frac{- 22}{9}\) \(\frac{129}{7} - \frac{69}{4} = \frac{516 - 483}{28} = \frac{33}{28}\) \(30^{2} - 5^{4} = 900 - 625 = 275\) \(25 - 12 \cdot 25 = 25 - 300 = - 275\) Khi đó: \(\left(\right. \frac{- 22}{9} \div \frac{33}{28} \cdot \frac{275}{- 275} \left.\right) = \left(\right. \frac{- 22}{9} \cdot \frac{28}{33} \cdot \left(\right. - 1 \left.\right) \left.\right) = \frac{616}{297}\) Bước 3: Tính vế phải Tử số: \(\frac{2}{11} + \frac{3}{13} + \frac{4}{15} + \frac{5}{17} = \frac{35494}{36465}\) Mẫu số: \(4 \frac{1}{11} + \frac{5}{13} + \frac{9}{15} + \frac{13}{17} = \frac{149645}{36465}\) → Vế phải: \(\frac{35494}{36465} \div \frac{149645}{36465} = \frac{35494}{149645}\) Bước 4: Giải phương trình \(\frac{616}{297} \cdot x = \frac{35494}{149645} \Rightarrow x = \frac{35494}{149645} \cdot \frac{297}{616} = \frac{813}{7118}\) Vậy: \(\boxed{x = \frac{813}{7118}}\) hỉu không =]]]
\(=\left(\frac{19}{37}-\frac{19}{37}\right)+1\)