nhanh 5 vote 1 cảm
a. 2/5 + x =4 b. 8/7 : x =4/5
nhanh 5 vote 1 cảm
a. 2/5 + x =4 b. 8/7 : x =4/5
`2/5 + x =4`
`x=4 – 2/5`
`x= 18/5`
`;`
`;`
`8/7 : x =4/5`
`x=4/5 * 8/7`
`x= 32/35`
a. $\frac{2}{5}$ + x= 4
x= 4 – $\frac{2}{5}$
x= $\frac{18}{5}$
b. $\frac{8}{7}$ : x= $\frac{4}{5}$
x= $\frac{4}{5}$ × $\frac{8}{7}$
x= $\frac{32}{35}$