Question

afla nr a b c d stiind ca sunt direct proportionale cu 2 3 5 7 si 7a+9b+3c+2d=350​

Answer 1

Răspuns:

a/2=b/3=c/5=b/7=k => a=2k b=3k c=5k d=7k

7×2k+9×3k+3×5k+2×7k=350

14k+27k+15k+14k=70k=350

k=350÷70=5 => a=10

b=15

c=25

d=35