Aclimbing gym $10 each day. a pair of climbing shoes cost $84. it cost $169 to buy 6 days of climbing, one pair of climbing shoes, and one harness. how much does a harness cost?

What you buy in total is
6 days
1 pair of shoes
1 harness

they all add up to 169

the costs area
1 day=10 (therefor 6 days=6 times 10=60)
1 pair of shoes=84
1 harness=x unknown

6days+1pairofshoes+1harness=169
so subsitute
60+84+x=169
add like terms
144+x=169
subtract 144 from both sides
x=25

harness cost $25

Hnmmmn not sure