Question

6 kg de mere costa 18 lei. Cat costa 7 kg de mere? Dar 11 kg de mere?
Ps: trebuie cu proportii

Answer 1

1Cat costa un kilogram?
18/6=3 lei
2.Cat costa 7 kilograme?
3*7=21 lei
3.cat costa 11 kilograme?
3*11=33 lei
Multumit?

Answer 2

$\frac{6}{18} = \frac{7}{x} =\ \textgreater \ 6x=7*18=\ \textgreater \ x=126:6=\ \textgreater \ x=21lei.costa.7kg.mere \\ \\ \frac{6}{18} = \frac{11}{x} =\ \textgreater \ 6x=11*18=\ \textgreater \ x=198:6=\ \textgreater \ x=33 lei.costa.11kg.mere$