tìm x
a,
$\frac{12}{7}$ : x + $\frac{2}{3}$ = $\frac{7}{5}$
b,16 : [($\frac{3}{5}$ . x + 8 ) : 21 + 9 ] = $\frac{7}{10}$
tìm x
a,
$\frac{12}{7}$ : x + $\frac{2}{3}$ = $\frac{7}{5}$
b,16 : [($\frac{3}{5}$ . x + 8 ) : 21 + 9 ] = $\frac{7}{10}$
a)
12/7: x+2/3=7/5
12/7: x =7/5-2/3
12/7: x = 11/15
x =12/7 : 11/15
x =180/77
a) `12/7 : x + 2/3 = 7/5`
`12/7 : x = 7/5 – 2/3`
`12/7 : x = 11/15`
`x = 12/7 : 11/15`
`x = 12/7 . 15/11`
`x = 180/77`
b) `16 : [(3/5 . x + 8) : 21 + 9] = 7/10`
`[(3/5 . x + 8) : 21 + 9] = 16 : 7/10`
`(3/5 . x + 8) : 21 + 9 = 160/7`
`(3/5 . x + 8) : 21 = 160/7 – 9`
`(3/5 . x + 8) : 21 = 97/7`
`3/5 . x + 8 = 97/7 . 21`
`3/5 . x + 8 = 97/147`
`3/5 . x = 97/147 – 8`
`3/5 . x = -1079/147`
`x = -1079/147 : 3/5`
`x = -5395/441`