Question

tim x

100-(x:5+3/2)=80

Answer 1

         100 - ( x : 5 +3/2 ) = 80

<=>   x : 5 + 3/2 = 100 - 80 

<=>   x : 5 + 3/2 = 20

<=>   x : 5 = 37/2

<=>     x = 185/2

Vậy _

Answer 2

100- (x:5+3/2)=80

=> x:5 + 3/2  = 100-80

=> x:5 + 3/2  = 20

=> x:5         =  20- 3/2 

=>x:5          = 37/2

=> x            =185/2

Vậy x = 185/2