Question

multumesc anticipat, :)

Answer 1

a)145:0,5=290
b)145:0,4=382,5
c)145:3=48,(3)

Answer 2

a·1/2=b·4/10=c·3=k
⇒a·1/2=k⇒a=k/1/2⇒a=k·2=2k;
⇒b·4/10=k⇒b·2/5=k⇒b=k/2/5⇒b=k·5/2=5k/2;
⇒c·3=k⇒c=k/3;
⇒a+b+c=145
⇒2k+5k/2+k/3=145
⇒12k/6+15k/6+2k/6=145
⇒29k/2=145
⇒k=2·145/29
⇒k=2·5⇒k=10;
⇒a=2·10=20;
⇒b=5·10/2=5·5=25;
⇒c=10/3=3,[3];