Ten times the number n decreased by 13 is equal to the square of the same number n increased by 3

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

Sole the equation 6n + 9 = -3n - 21 - 6 for n