Patel has 5 less than 4 times as many model cars as Horatio. He has 19 model cars in all. Let c equal the number of model cars Horatio has. Write the equation that can be used to find the number of model cars Horatio has.
4c - 5 + 19
15
Bianca deposits $10 in a savings account each Monday and an extra $20 during her birthday week. In her birthday month, she deposited a total of $60. Write an equation to find m, the number of Mondays in Bianca's birthday month