Question

si: a+b-c=3y
3/a=5/b=7/c hallar el valor de a-b+c

Answer 1

a=3k b=5k c=7k entonces a+b-c=3y ; 3k+5k-7k=3y ; k=3y piden a-b+c ; 3k-5k+7k = 5k = 5(3y) =15y