1. Tìm X, biết: x - \(\dfrac{2}{3}\) x ( X + 9 ) = 1
2. Tìm X, biết: X - \(\dfrac{11}{15}\) = \(\dfrac{3+X}{5}\)
Tính bằng cách thuận tiện nhất:
a) 60 x (\(\dfrac{7}{12}\) + \(\dfrac{4}{15}\))
b) \(\dfrac{1}{2}\) x \(\dfrac{2}{3}\) x \(\dfrac{3}{4}\) x \(\dfrac{4}{5}\) x \(\dfrac{5}{6}\) x \(\dfrac{6}{7}\) x \(\dfrac{7}{8}\) x \(\dfrac{8}{9}\)
Tìm x, biết:
a) x - 2 = \(\dfrac{7}{15}\)
b) \(\dfrac{9}{20}\) + x = \(\dfrac{2}{5}\) + \(\dfrac{3}{20}\)
1. Tính bằng cách thuận tiện nhất:
\(\dfrac{2}{5}x\dfrac{12}{3}+\dfrac{2}{5}x\dfrac{15}{3}+\dfrac{2}{5}\)
2. Tìm số tự nhiên a, biết: \(\dfrac{3}{4}< a< \dfrac{11}{4}\)
Tìm x, biết \(\dfrac{7}{x-5}\) = \(\dfrac{56}{32}\)
(trình bày đày đủ)
Tìm x:
a) x - \(\dfrac{5}{7}\) = \(\dfrac{3}{5}\) x \(\dfrac{1}{2}\) b) x \(x\dfrac{2}{3}=\dfrac{5}{8}+\dfrac{3}{4}\)
Tìm x:
\(\dfrac{3}{4}-x=\dfrac{1}{8}\)
Tính bằng cách thuận tiện:
\(\dfrac{2}{5}\)x\(\dfrac{9}{4}-\dfrac{5}{4}\)x\(\dfrac{2}{5}\)
tìm x:
a) \(\dfrac{24}{35}\) - x = \(\dfrac{2}{7}\)
b) x - \(\dfrac{5}{6}\) = \(\dfrac{7}{8}\)
c) x - \(\dfrac{11}{5}\) = \(\dfrac{2}{5}\) : \(\dfrac{2}{3}\)
(giải chi tiết hộ mình)
Tìm x
a, \(\dfrac{5}{8}\) \(-\) \(x\) \(=\) \(\dfrac{4}{7}\) x\(\dfrac{1}{4}\)
b, \(x:\) \(\dfrac{4}{5}\) \(=\) \(\dfrac{3}{4}\) \(+\) \(\dfrac{1}{6}\)