Question 1027962
A construction crew is lengthening a road. Let 
L
 be the total length of the road (in miles). Let 
D
 be the number of days the crew has worked. Suppose that 
=L+4D200
gives 
L
 as a function of 
D
. The crew can work for at most 
70
 days. 
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=L+4D200 is not clear, not an equation.