Answer:
8 blue tiles and 20 green tiles in the bag
Explanation:
Let b represent the number of blue tiles and g the number of green tiles. Since bag contains 28 blue and green tiles hence:
b + g = 28 (1)
Also, there is two blue tiles for every 5 green tiles, hence:
2g = 5(b);
5b - 2g = 0 (2)
Multiply equation 1 by 5 and subtract equation 2 from the result:
7g = 140
g = 20
b + g = 28; b + 20 = 28
b = 8
Therefore there are 8 blue tiles and 20 green tiles in the bag
