Question

There are 12 red and blue pencils on a desk.There are twice as many red pencils as blue pencils.How many read pencils are there on the desk?

Answer 1

r+b =12

r =2b  (twice as many red as blue)

substitute r = 2b into r+b=12

2b + b = 12

3b =12

divide by 3

b=4

r = 2b

r=2(4)

r=8

There are 4 blue pencils and 8 red pencils

Answer 2

8 red......................................4 blue hope it helps!

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