5 less than a number is equivalent to 1 more than three times the number

The number is ??

Adaycare center charges a $75 enrollment fee plus $100 per week. which of the following represents the cost of sending a child to daycare for 14 weeks?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way