[tex]10.4 \times 3 \frac{5}{7} = \frac{x}{ \frac{5}{42} } [/tex]

я. ош. х=4цел.88/147

10цел.4/10. •26/7=42х/5104/10 •26/7=42х/552/5 •26/7=42х/5(52•26 )/(5•7)=42х/552•26•5=42х•5•7х=(52•26•5)/(42•5•7)х=(52•26)/(42•7)х=676/147х=4цел4/147