Question

2-31. Write an equation and solve it to find the answer to the question below.  Use the 5-D Process to help you write the equation, if needed.  Remember to define your variable and to write your answer in a complete sentence.
Susan is buying three different colors of tiles for her kitchen floor.  She is buying 25 more red tiles than beige tiles, and three times as many navy-blue tiles as beige tiles.  If Susan buys 435 tiles altogether, how many tiles of each color does she buy?

Answer 1

r = 25+b

n = 3b

n+r+b=435

3b+25+b+b=435

5b+25=435

5b=210

b=42

r = 25+42 = 67

n = 3(42) = 126