algebra
posted by paul .
Quan is shopping. He can buy 2 pairs of pants and 1 shirts for $79.85 ( before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85 (before tax is added). To figure out how much a shirt or a pair of pants costs,you must first identify the conditions. What is one of the conditions in this problem?
a) items for $79.85
b) 1 pair of pants and 2 shirts for $69.85
c)3 items total
d) the cost of a shirt
i would like to know if my answer is right or wrong. a

what is the solutionof the following linear system?
2x + y = 1
x + 1/2y =1/2
a) (2,1)
b) none
c) (1/2,2)
d) infinite number of solutions