Question

Tìm x 

( 2,8.x - 32 ) :\(\frac{2}{3}\)= - 90

Answer 1

(2,8.x-32):2/3=-90

=>2,8.x-32=90x2/3

=>2,8.x-32=60

=>2,8.x=60+32

=>2,8.x=92

=>x=92:2,8

=>x=230/7

Answer 2

( 2,8.x - 32 ) : \(\frac{2}{3}\) = - 90

= 2,8.x - 32 = 90. \(\frac{2}{3}\) 

= 2,8.x - 32 = 60

= 2,8.x = 60 + 32

= 2,8.x = 92

 x = 92 : 2,8 

 x = \(\frac{230}{7}\)

Vậy x bằng \(\frac{230}{7}\)