\(\frac{7}{3}+\frac{4}{3}:\frac{5}{4}\\ =\frac{7}{3}+\frac{4}{3}\cdot\frac{4}{5}\\ =\frac{7}{3}+\frac{16}{15}\\ =\frac{35}{15}+\frac{16}{15}\\ =\frac{51}{15}\\ \frac{17}{15}\)

\(=\frac{7}{3}+\frac{5}{3}\)

\(=\frac{12}{3}=4\)

=3/10+13/10

=16/10

\(=\frac{8}{5}=1\frac{3}{5}\)

k mình nha

B=2020:m+2015+n

B=2020:2+2015+n

B=1010+2015+n

B=3025+n

để B=4000 thì n có giá trị là

4000-3025=975

câu tiếp theo

số lớn nhất có bốn chữ số khc nhau là 9876

khi đó: 2k+328:4=9876

2k+82=9876

2k=9876-82

2k=9794

k=9794:2

k=4897

2 x k mà sao lại là 2k?

Ta có : 

      \(5-\frac{7}{5}:\frac{3}{10}+\frac{2}{5}\)

\(=5-\frac{7}{5}x\frac{10}{3}+\frac{2}{5}\)

 \(=5-\frac{14}{3}+\frac{2}{5}\) 

  \(=\frac{15}{3}-\frac{14}{3}+\frac{6}{15}\)

   \(=\frac{1}{3}+\frac{6}{15}\)

    \(=\frac{5}{15}+\frac{6}{15}\)

    \(=\frac{11}{15}\)

Tham khảo nha !!!! 

5 - \(\frac{7}{5}\):    \(\frac{3}{10}\)+    \(\frac{2}{5}\)=    5 - \(\frac{14}{3}\)+    \(\frac{2}{5}\)

                                              =    \(\frac{1}{3}\)+    \(\frac{2}{5}\)

                                              =     \(\frac{11}{15}\)

\(\frac{5}{8}:x=\frac{3}{4}\)

\(x=\frac{5}{8}:\frac{3}{4}\)

\(x=\frac{5}{6}\)

\(\frac{2}{4}+\frac{3}{4}:\frac{1}{2}\)

\(=\frac{2}{4}+\frac{6}{4}\)

\(\frac{8}{4}=2\)

Hok tốt

A = m x 3 + n x 4 + p x 2 + m + 2 x p

= m x 4 + n x 4 + p x 4

= (m + n + p) x 4

a, \(y-\frac{1}{6}=\frac{5}{6}\)

\(y=\frac{5}{6}+\frac{1}{6}\)

\(y=1\)

b, 1295.23-16839

=29785-16839

=12946

_HT_

A) y= 1   

b) 12946