Question

Stiind ca $\frac{3a}{2b} = \frac{5}{4}$ , $\frac{3b}{5c} = \frac{6}{7}$ si a + b + c = 1672, aflati a, b, c.

Answer 1

3a x 4 = 2b x 5
12a = 10b

3b x 7 = 5c x 6
21b=30c

inlocuim in a+b+c
12a + 31b + 30c = 1672
acum le luam pe fiecare separat *-*

12a=1672
a=1672/12
a=139(3)
31b=1672
b=1672/31
b=53.93
30c=1672
c=1672/30
c=55.7(3)

huh sper ca este bine si ca te-am ajutat ^_^ *-*