Asked by Jose
If you have 21tiles and there are twice as many blue than red and twice as many red than green how many red green and blue are there.
Answers
Answered by
Reiny
r + b + g = 21
b = 2r
r = 2g
sub back into the first
r + 2r + r/2 = 21
3.5r = 21
r = 6
so 6 red
12 blue and
3 green
check: do they add up to 21 ? YES
are there twice as many blue than red ? YES
are there twice as many red than green ? YES
b = 2r
r = 2g
sub back into the first
r + 2r + r/2 = 21
3.5r = 21
r = 6
so 6 red
12 blue and
3 green
check: do they add up to 21 ? YES
are there twice as many blue than red ? YES
are there twice as many red than green ? YES
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