Question

Cunoscand 5a+2b=36 si $\frac{a}{4}$=$\frac{b}{5}$=$\frac{c}{12}$,determinati a,b si c.

Answer 1

12a = 4c => a=4c/12
12b = 5c => b=5c/12

5a= 4b => a= 4b/5
4b+ 2b = 36 => 6b = 36 => b = 6
a= 24/5

6/5 = c/12 => 72 = 5c => c = 72/5