Question 179815
I was wondering how to solve this problem. 

4c=3d+3
c=d-1 
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Substitute and solve for "d":

4(d-1) = 3d + 3

4d - 4 = 3d + 3

d = 7
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Since c = d-1, c = 7-1 = 6
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Cheers,
Stan H.