Question

determina numarul natural c, stiind ca: a÷b=7 ,c÷a=5,a-b=60

Answer 1

a=7b  si  c=5a=5*7b=35b
a-b=60 =>7b-b=60 => b=10
 => a=7*10=70 si
 => c=5*70=350
Proba:    a:b=70:10=7 
            c:a=350:70=5 
            a-b=70-10=60