Question

Music lessons cast $20 per week How much do 6 weeks of lesson cost

Answer 1

$20\ \ for\ 1\ week\\ x\ for\ 6\ weeks\\\\ proportion:\\ 20-1\\x-6\\\\cross\ multiplication\\\\ 20*6=x\\\\ 120=x\\\\ 6\ weeks\ of \ lessons\ cost\ 120\ .$

Answer 2

$20*6=120$ 20=$20 per week 6=6 weeks