at the local clothing store, 3 similar shirts and 4 similar jackets cost $360 and 1 shirt and 3 jackets cost $220. find the cost of each shirt.

Answer 1

3s + 4j= 360
s + 3j = 220

from the second: s = 220 - 3j
sub into the first:
3(220 - 3j) + 4j = 360
-5j = -300
j = 60
then s = 220 - 180 = 40

Answer 2

650-40=510