7th Grade math pls help

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.