Question

Daca a si b sunt direct proportionale cu 2,5 ,iar a+b=56 atunci a=?
b=?

Answer 1

(a,b) ~ (2,5)
a+b=56
----------------
a=?
b=?

a/2=b/5

LE  AFLAM  IN  FUNCIE  DE  ,,k"

a/2=k/1
a*1=2*k
a=2k

b/5=k/1
b*1=5*k
b=5k

a+b=56 ==> 2k+5k=56
7k=56
k=56:7
k=8

a=2*8=16
b=5*8=40

Answer 2

a+b=56
{a,b}-DP{2,5}
a/2=b/5
a=2K
b=5K
a+b=56 sau 2K+5K=56
7K=56
K=8
a=K•2
a=8•2
a=16
b=K•5
b=8•5
b=40
Sper căte-am ajutat$