Question

x:2:4+505=579.Tìm x

Answer 1

ta co x :2 : 4 + 505 +579

=> x : 2 : 4 = 579 - 505  = 74

=> x:2 = 74 x 4 = 296

=> x = 296m x 2 

        =  592

Answer 2

x:2:4+505=579

x:2:4=579-505

x:2=74x4

x=296x2

x=592

Answer 3

x:2:4+505=579

x:2:4=579-505

x:2:4=74

x:4=74*4

x:4=296

x=296*4

x=592