SOLUTION: 7c+5d=18 c-5d=-2

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Question 274935: 7c+5d=18 c-5d=-2
Answer by user_dude2008(1862) About Me  (Show Source):
You can put this solution on YOUR website!
c-5d=-2
c=5d-2

7c+5d=18
7(5d-2)+5d=18
35d-14+5d=18
40d=32
d=32/40
d=4/5
c=5d-2=5(4/5)-2=4-2=2

Answers: c=2, d=4/5