Problema Solution
you bought a new shirt for $15.95 and 5 pairs of socks. Your friend bought 10 pairs of socks and spent $4.20 less than you. How much did each pair od socks cost?
Answer provided by our tutors
your cost is represented by
c = 15.95 + 5s, where s is the cost of one pair of socks
your friend's cost is represented by
c - 4.20 = 10s
substitute the first equation into the second for c, and solve for s
15.95 + 5s - 4.20 = 10s
11.75 + 5s = 10s
11.75 = 5s
2.35 = s
therefore, each pair of socks cost $2.35