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Va rog ajutati.ma la exercitiile 28,30,31.
Please!!!


Va Rog Ajutatima La Exercitiile 283031 Please class=

Răspuns :

(a+b+c) : 3 = 16
{a,b,c} dp {4,5,7}
a/4 + b/5+ c/7 = K

a/4 = K => a=4K
b/5= K => b=5K
c/7 = K => c=7K
 ( 4K+5K+7K ) : 3 = 16
 16K = 16 * 3
 16K = 48
 K = 48 : 16
 K = 3

a=4*3
a=12

b=5*3
b=15

c=7*3
c=21