SOLUTION: Laura, Chang, and Dale sent a total of text messages 144 during the weekend. Chang sent 4 times as many messages as Dale. Laura sent 6 fewer messages than Dale. How many messages d

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Question 1122818: Laura, Chang, and Dale sent a total of text messages 144 during the weekend. Chang sent 4 times as many messages as Dale. Laura sent 6 fewer messages than Dale. How many messages did they each send?
Answer by josgarithmetic(39630) About Me  (Show Source):
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Chang         4d       100
Dale           d        25
Laura         d-6       19
Total         144

6d-6=144
d-1=24
d=25