Asked by Andree

I'm having trouble with the last one too. Could you explain step by step. thanks.
4c= 3d+3
c= d -1
Answered by Reiny
4c= 3d+3 , but you also told me c = d-1 so..
4(d-1) = 3d+3
4d - 4 = 3d + 3
4d - 3d = 3 + 4
d = 7

sub that back into c=d-1
c = 7-1 = 6
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