Răspuns :
a = 4k
b = 5k
a + b = 18
4k + 5k = 18
9k = 18
k = 18 : 9
k = 2
a = 4 * 2
a = 8
b = 5 * 2
b = 10
8 + 10 = 18 => 18 = 18
b = 5k
a + b = 18
4k + 5k = 18
9k = 18
k = 18 : 9
k = 2
a = 4 * 2
a = 8
b = 5 * 2
b = 10
8 + 10 = 18 => 18 = 18
a+b=18
{a,b}dp{4,5}⇒a/4=b/5=(a+b)/(4+5)=18/9=2
a/4=2⇒a=4*2=8
b/5=2⇒b=5*2=10
{a,b}dp{4,5}⇒a/4=b/5=(a+b)/(4+5)=18/9=2
a/4=2⇒a=4*2=8
b/5=2⇒b=5*2=10