Sierra is selling bracelets to raise money for the language club at school. each bracelet with yellow beads sells for $5. each bracelet with orange beads sells for $6. she raised $660 for the club. the number of bracelets with yellow beads that sierra sold is 8 more than twice the number of bracelets with orange beads. let y represent the number of bracelets with yellow beads and r represent the number of bracelets with orange beads. which system of equations will solve for the number of each type of bracelet sold?