Mrs. Lopez joins the local gym and pays $50 per month. Each exercise class is an
additional $10. If her bill for the gym last month was $120, how many
exercise classes did she attend? c = the number of classes *

Choose the equation that matches this real world problem.

1) 10c-50=120
2) 50c-10=120
3) 10c+50=120
4) 120+10c=50