The product of a number and 5 less than the number is 6. find the number

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

I'm confused on this could anyone me and show me what i need to do to solve it.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.