Question

найдите х в пропорциях 2,7/9=1целая 1/5/3х+1

Answer 1

(3х+1)*2,7=1/5*9

(3х+1)*2,7=10 4/5

3x+1=10 4/5 : 27

3х=1-2/5

3x=3/5

x=3/5:3

х=2 2/5