Question

срочно!!!!!!!!!!!!!!!​

Answer 1

Ответ:

Объяснение:

(0,2x+0.5y)/30=0.3

x+y=30

y=30-x

(0.2x+0.5*(30-x))/30=0.3

0.2x+15-0.5x=0.3*30

0.2x+15-0.5x=9

0.2x-0.5x=9-15

-0.3x=-6

x=-6/(-0.3)

x=20

y=30-20=10