Question

1/3•x+2/5•(x-1)=4 Vậy x bằng bao nhiêu?

Answer 1

1/3*x+2/5*(x-1)=4

1/3*x+2/5*x-2/5=4

1/3*x+2/5*x=4+2/5

(1/3+2/5)*x=4 2/5

11/15*x=22/5

         x=22/5/11/15

         x=22/5*11/15

         x=242/75

Answer 2

ủa vậy ư

Answer 3

1/3•x+2/5•x+2/5=4 =(1/3•2/5)•x=(4+2/5)=11/2