Question

[lưu trâm]

giúp mik với ạ!!

a) \(x\) - \(\dfrac{1}{5}\) = \(\dfrac{2}{11}\)                         b) \(\dfrac{x}{5}\) = \(\dfrac{5}{6}\) + \(\dfrac{-19}{30}\)

c) \(x\) = \(\dfrac{-1}{2}\) + \(\dfrac{3}{4}\)                        d) \(\dfrac{11}{8}\) + \(\dfrac{13}{6}\) = \(\dfrac{85}{x}\) 

e) \(x\) - \(\dfrac{-6}{15}\) = \(\dfrac{4}{27}\)                       f) \(x\) - \(\dfrac{4}{6}\) = \(\dfrac{5}{25}\) + \(\dfrac{-7}{15}\)

g) - \(\dfrac{-7}{5}\) + \(x\) = \(\dfrac{4}{9}\)

Cảm ơn ạ!!

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(x-\dfrac{1}{5}=\dfrac{2}{11}\)

=>\(x=\dfrac{2}{11}+\dfrac{1}{5}=\dfrac{10}{55}+\dfrac{11}{55}=\dfrac{21}{55}\)

b: \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{-19}{30}\)

=>\(\dfrac{x}{5}=\dfrac{25-19}{30}=\dfrac{6}{30}=\dfrac{1}{5}\)

=>x=1

c: Đề thiếu vế phải rồi bạn

d: \(\dfrac{11}{8}+\dfrac{13}{6}=\dfrac{85}{x}\)

=>\(\dfrac{85}{x}=\dfrac{11\cdot3+13\cdot4}{24}=\dfrac{85}{24}\)

=>x=24

e: \(x-\dfrac{-6}{15}=\dfrac{4}{27}\)

=>\(x+\dfrac{2}{5}=\dfrac{4}{27}\)

=>\(x=\dfrac{4}{27}-\dfrac{2}{5}=\dfrac{20-54}{135}=\dfrac{-34}{135}\)

f: \(x-\dfrac{4}{6}=\dfrac{5}{25}+\dfrac{-7}{15}\)

=>\(x-\dfrac{2}{3}=\dfrac{1}{5}+\dfrac{-7}{15}=\dfrac{-4}{15}\)

=>\(x=-\dfrac{4}{15}+\dfrac{2}{3}=\dfrac{-4}{15}+\dfrac{10}{15}=\dfrac{6}{15}=\dfrac{2}{5}\)

g: \(-\dfrac{-7}{5}+x=\dfrac{4}{9}\)

=>\(x+\dfrac{7}{5}=\dfrac{4}{9}\)

=>\(x=\dfrac{4}{9}-\dfrac{7}{5}=\dfrac{20-63}{45}=\dfrac{-43}{45}\)

Answer 2

[Nguyễn Phạm Hoàng Long]

a, \(x-\dfrac{1}{5}=\dfrac{2}{11}\)

\(x=\dfrac{2}{11}+\dfrac{1}{5}\)

\(x=\dfrac{21}{55}\)

b, \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{\left(-19\right)}{30}\)

\(\dfrac{x}{5}=\dfrac{1}{5}\)

=> x = 1

gửi bạn câu a và b trước, lát mình gửi những câu còn lại sau nhé