Question

A painter uses 20 drops of red paint and 45 drops if white paint to make a certain shade of pink. How many drops of white paint should he add to 12 drops of red paint to make the same shade.

Answer 1

`(20)/(45)= (12)/(x) \\ \\ 20*x=45*12 \\ \\ 20x= 540 \\ \\ x=27 \\ \\ 27drops`