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If Box A has 8 red pens, Box A would have a total of 30 - 8 = 22 blue pens.
Since Box A has twice as many blue pens as Box B, number of blue pens in Box B = 22/2 = 11.
Number of red pens in Box B
= 30 - 11
= 19
Since Box A has twice as many blue pens as Box B, number of blue pens in Box B = 22/2 = 11.
Number of red pens in Box B
= 30 - 11
= 19
Thanks for the help