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Sabrina used 21 tiles to make a design. She used twice as many blue tiles as red tiles. She used twice as many red tiles as green tiles. How many tiles of each color did Sabrina use?

Verified Answer :

SlowZasob

Sabrina has 21 tiles overall.
Green tiles: x
Red tiles: 2x
Blue tiles: 2 2x = 4x

We can write it all as:

21 = x + 2x + 4x
21 = 7x                              / ÷ 7 (both sides)
x = 3

Doublecheck:

Green tiles: 3
Red tiles: 2 3 = 6
Blue tiles: 2 * 6 = 12
All tiles: 3 + 6 + 12 = 21

Correct :)

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