Question

1, Tìm x:

8,75 x X + 1,25 x X = 20

Answer 1

(8,75 + 1,25) x x = 20

10 x X = 20

x = 20 : 10

x = 2

Answer 2

x.(8,75+1,25)=20

x.10=20

x=2

Answer 3

(8,75 + 1,25) x x = 20

10                 x X = 20

                        X = 20 : 10

                       X  = 2