Question

Sase muncitori termina o lucrare in 5 zile.Afla in cate zile pot termina aceeasi lucrare 2 muncitori?

Answer 1

$6muncitori................5zile$
$2muncitori................x zile$
--------------------------------------------$i.p.$

$\frac{6}{2}=\frac{x}{5}$

$\frac{x}{5}=3$

$x=3*5$

$\boxed{x=15~(zile)}$


$Raspuns:~in~15~zile$

Answer 2

6/2-(x/5)=0
6/2-x/5=0
3-x/5=0
3=3/1=(3*5)/5
3*5-x     15-x
------- =--------
  5           5
15-x
------- =0
   5
15-x
------ *5=0*5
   5

15-x=0

-x+15=0
-x=-15
x=15