a, 1/ 2 x – 7/6 = 19/3 : 38/9
b, 3,5x + 1 1/5(hỗn số) = 1 6/5(hỗn số)
c, 5/4 x = 20
a, 1/ 2 x – 7/6 = 19/3 : 38/9 b, 3,5x + 1 1/5(hỗn số) = 1 6/5(hỗn số) c, 5/4 x = 20
By Remi
By Remi
a, 1/ 2 x – 7/6 = 19/3 : 38/9
b, 3,5x + 1 1/5(hỗn số) = 1 6/5(hỗn số)
c, 5/4 x = 20
a) $\frac{1}{2}$ x – $\frac{7}{6}$ = $\frac{19}{3}$ : $\frac{38}{9}$
⇔ $\frac{1}{2}$ x – $\frac{7}{6}$ = $\frac{19}{3}$ . $\frac{9}{38}$
⇔ $\frac{1}{2}$ x – $\frac{7}{6}$ = $\frac{3}{2}$
⇔ $\frac{1}{2}$ x = $\frac{3}{2}$ + $\frac{7}{6}$
⇔ $\frac{1}{2}$ x = $\frac{8}{3}$
⇔ x = $\frac{8}{3}$ : $\frac{1}{2}$
⇔ x = $\frac{16}{3}$
b) 3,5x + 1 $\frac{1}{5}$ = 1 $\frac{6}{5}$
⇔ 3,5x + $\frac{6}{5}$ = 1 $\frac{6}{5}$
⇔ 3,5x = 1 $\frac{6}{5}$ – $\frac{6}{5}$
⇔ 3,5x = 1
⇔ x = $\frac{1}{3,5}$ = $\frac{2}{7}$
c) $\frac{5}{4}$ x = 20
⇔ x = 20 : $\frac{5}{4}$
⇔ x = 20 . $\frac{4}{5}$
⇔ x = 16
a, `1/ 2` `x` – `7/6` = `19/3` : `38/9`
`1/ 2` `x` – `7/6` = `3/2`
`1/ 2` `x` = `3/2` + `7/6`
`1/2` `x` = `8/3`
`x` = `8/3` : `1/2`
`x` = `16/3`
b) `3,5` `x` + 1`1/5` = 1`6/5`
`35/10` `x` + `6/5` = `11/5`
`35/10` `x` = `11/5` – `6/5`
`35/10` `x` = 1
`x` = 1:`35/10`
`x` = `2/7`
c, `5/4` `x` = `20`
`x` = `20` : `5/4`
`x` = `20` . `4/5`
`x` = 16