Răspuns:
b ) 10 zile; 5 . 13 / 5
Explicație pas cu pas:
b )
20 iepuri ..... 7 zile
14 iepuri ..... x zile
x = ( 20 · 7 ) / 14
x = 140 / 14
x = 10 zile
5.
m / n = 5
m = 5 · n
m = 5n
--------------
( 2m + 3n ) / m = ( 2 · 5n + 3n ) / 5n =
= ( 10n + 3n ) / 5n
= 13n / 5n
= 13 / 5
1.
20 iepuri..........................7 zile
14 iepuri ..........................x sunt marimi invers propotionale
x=20/14×7=20/2=10 zile
2. m/n=5 n/m=1/5
(2m+3n)/m=2+3(n/m)=2+3/5=13/5
