Question

x:7/8+3/4=7/4

dấu gạch chéo là phân số

 

Answer 1

Ta có:       x:7/8+3/4=7/4

                -> x:7/8=7/4-3/4

                ->x:7/8=1

                ->x=1*7/8

                ->x=7/8

                  Vậy x=7/8

Answer 2

\(x\div\frac{7}{8}+\frac{3}{4}=\frac{7}{4}\)

\(\Rightarrow x\div\frac{7}{8}=\frac{7}{4}-\frac{3}{4}\)

\(\Rightarrow x\div\frac{7}{8}=1\)

\(\Rightarrow x=1\times\frac{7}{8}\)

\(\Rightarrow x=\frac{7}{8}\)

Answer 3

\(\frac{x:7}{8}+\frac{3}{4}=\frac{7}{4}\)

\(\frac{x:7}{8}+\frac{6}{8}=\frac{14}{8}\)

\(\Rightarrow x:7+6=14\)

\(x:7=14-6\)

\(x:7=8\)

\(x=8\cdot7\Rightarrow x=56\)