The total cost of 100 paper plates and 200 paper cups is $7.50 At the same rates what is the total cost of 20 of the plates and 40 of the cups?  Answers
A) $.90 B) $1.00 C) $1.20 D) $1.50 E) $1.60
U dont need to go through all this   What u have with u is   100 P + 200 C = $7.50   Just divide the equation by 5 and you will get what u are looking for   20P + 40 C = $1.50   Therefore OA is $1.50
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The total cost of 100 paper plates and 200 paper cups is $7.50 At the same rates what is the total cost of 20 of the plates and 40 of the cups?