Question

10/18=c/4.5
what is c

Answer 1

$\frac{10}{18}=\frac{c}{4,5}\\\\cross\ multiplication\\\\ 4,5*10=18c\\\\ 45=18c\ \ \ \ | divide\ by\ 18\\\\ c=\frac{45}{18}=2\frac{1}{2}\\\\\ \boxed{c=2\frac{1}{2}}$