Tìm x, biết
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Bài 3: Tìm x biết:
1) \(\frac{2}{3} x = \frac{4}{27}\)
2) \(-\frac{3}{5} x = \frac{21}{10}\)
3) \(x \cdot \frac{-3}{7} = \frac{5}{21}\)
4) \(\frac{-4}{7} x = \frac{-2}{5}\)
5) \(\frac{8}{15} x = \frac{-20}{21}\)
6) \(-\frac{5}{7} \cdot x = \frac{-20}{35}\)
7) \(x \cdot \frac{12}{13} = \frac{-26}{27}\)
8) \(x = \left(-\frac{2}{5}\right) = \frac{-15}{16}\)
Bài 4: Tìm x biết:
1) \(\frac{13}{20} + \frac{3}{5} + x = \frac{5}{6}\)
2) \(x + \frac{1}{3} = \frac{2}{5} - \left(-\frac{1}{3}\right)\)
3) \(\frac{2}{3} + x + 1 = \frac{11}{3}\)
4) \(\frac{3}{5} - x = -\frac{1}{4} + \frac{7}{10}\)
5) \(-\frac{3}{7} x = \frac{4}{5} + \frac{-2}{3}\)
6) \(-\frac{5}{6} - x = \frac{7}{12} - \frac{1}{3}\)
7) \(\frac{3}{7} - x = \frac{1}{4} - \left(-\frac{3}{5}\right)\)
8) \(-\frac{5}{8} - x = -\frac{3}{20} - \left(-\frac{1}{6}\right)\)
Bài 5: Tìm x biết:
1) \(-\frac{7}{12} - \frac{3}{5} - x = \frac{3}{4}\)
Bài 3: Tìm x biết:
1) \(\frac{2}{3} x = \frac{4}{27}\)
2) \(-\frac{3}{5} x = \frac{21}{10}\)
3) \(x \cdot \frac{-3}{7} = \frac{5}{21}\)
4) \(\frac{-4}{7} x = \frac{-2}{5}\)
5) \(\frac{8}{15} x = \frac{-20}{21}\)
6) \(-\frac{5}{7} \cdot x = \frac{-20}{35}\)
7) \(x \cdot \frac{12}{13} = \frac{-26}{27}\)
8) \(x = \left(-\frac{2}{5}\right) = \frac{-15}{16}\)
Bài 4: Tìm x biết:
1) \(\frac{13}{20} + \frac{3}{5} + x = \frac{5}{6}\)
2) \(x + \frac{1}{3} = \frac{2}{5} - \left(-\frac{1}{3}\right)\)
3) \(\frac{2}{3} + x + 1 = \frac{11}{3}\)
4) \(\frac{3}{5} - x = -\frac{1}{4} + \frac{7}{10}\)
5) \(-\frac{3}{7} x = \frac{4}{5} + \frac{-2}{3}\)
6) \(-\frac{5}{6} - x = \frac{7}{12} - \frac{1}{3}\)
7) \(\frac{3}{7} - x = \frac{1}{4} - \left(-\frac{3}{5}\right)\)
8) \(-\frac{5}{8} - x = -\frac{3}{20} - \left(-\frac{1}{6}\right)\)
Bài 5: Tìm x biết:
1) \(-\frac{7}{12} - \frac{3}{5} - x = \frac{3}{4}\)