Question

a, 5\24 + x= 7\12

b, x - 3\4=1\2

c, (2\7.x+3\7) :2 1\5-3\7=1

ai giúp minh với

Answer 1

a.

 \(\frac{5}{24}+x=\frac{7}{12}\)

  \(x=\frac{7}{12}-\frac{5}{24}\)

 \(x=\frac{3}{8}\)

b.

\(x-\frac{3}{4}=\frac{1}{2}\)

\(x=\frac{1}{2}+\frac{3}{4}\)

\(x=\frac{5}{4}\)

Answer 2

Trả lời:

a, \(\frac{5}{24}+x=\frac{7}{12}\)

\(\Rightarrow x=\frac{7}{12}-\frac{5}{24}\)

\(\Rightarrow x=\frac{3}{8}\)

b, \(x-\frac{3}{4}=\frac{1}{2}\)

\(\Rightarrow x=\frac{1}{2}+\frac{3}{4}\)

\(\Rightarrow x=\frac{5}{4}\)

c, \(\left(\frac{2}{7}x+\frac{3}{7}\right)\div2\frac{1}{5}-\frac{3}{7}=1\)

\(\Rightarrow\left(\frac{2}{7}x+\frac{3}{7}\right)\div\frac{11}{5}-\frac{3}{7}=1\)

\(\Rightarrow\left(\frac{2}{7}x+\frac{3}{7}\right)\div\frac{11}{5}=1+\frac{3}{7}\)

\(\Rightarrow\left(\frac{2}{7}x+\frac{3}{7}\right).\frac{5}{11}=\frac{10}{7}\)

\(\Rightarrow\frac{2}{7}x+\frac{3}{7}=\frac{10}{7}\div\frac{5}{11}\)

\(\Rightarrow\frac{2}{7}x+\frac{3}{7}=\frac{22}{7}\)

\(\Rightarrow\frac{2}{7}x=\frac{22}{7}-\frac{3}{7}\)

\(\Rightarrow\frac{2}{7}x=\frac{19}{7}\)

\(\Rightarrow x=\frac{19}{7}\div\frac{2}{7}\)

\(\Rightarrow x=\frac{19}{2}\)