Question 1168980
Mark, Max, Matt, and Mitch were writing an essay for English class.  Together their essays were 15,240 words.  Matt wrote 20 more words than Max.  Mark wrote twice as much as Matt.  Mitch wrote 100 words less than Max.  How many words did each of them have in their essay?
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Use a, b, c & d for Mark, Max, Matt, and Mitch respectively.
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c = b-20
a = 2c = 2b-40
d = b-100
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Add them.
a+b+c+d = 15240
(2b-40) + b + (b-20) + (b-100) = 15240