Asked by Mulolo
Three cups and four plates cost $87. Two cups and five plates cost $93. Then what is the cost of one cup?
Answers
Answered by
R_scott
3 c + 4 p = 87 ... multiplying by 2 ... A) 6 c + 8 p = 174
2 c + 5 p = 93 ... multiplying by 3 ... B) 6 c + 15 p = 279
subtracting A) from B) ... 7 p = 105
solve for p , then substitute back to find c
2 c + 5 p = 93 ... multiplying by 3 ... B) 6 c + 15 p = 279
subtracting A) from B) ... 7 p = 105
solve for p , then substitute back to find c
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