Question 1016308
L+C= 25, so construction alone: C = 25-L We will use this value for C next
9L+14C =>285 Now substitute for C:
9L+14(25-L) => 285
9L+350-14L=> 285 Subtract 350, both sides, and add L on left:
-5L => -65 Divide both sides by 5 and remember:1) -/- = + and 2) the < or > sign is reversed when we divide - and - and thus have a resulting +:
L =< 13 He needs to work no more than 13 hours at the library to make at least 285.
J