HELP DUE TOMORROW );

Question

kristin spent $131 on clothes. Shirts were $28 and pants were $15. If she bought a total of 7 then how many of each did she buy?

Answer 1

s=# of shirts

p=# of pants

s+p=7

28s+15p=131

if s+p=7, then p=7-s

substitute

28s+15(7-s)=131

28s+105-15s=131

13s+105=131

13s=131-105

13s=26

s=26/13

s=2 shirts and p=5 pants

2*28+5*15=56+75=131