a) Mrs. Boudreaux's classroom floor is covered with square foam tiles. Currently, the floor
contains 30 blue square foam tiles, 60 red square foam tiles, and 70 green square foam tiles.
Since her favorite color is red, she wants half of the square files to be red. How many red foam
tiles must she add to the 160 square foam files she already has until HALF of the foam tiles are
red?
