A shoe store donated a percent of every sale to hospitals. The total sales were ​$6,060 so the store donated ​$303. What percent of ​$6,060 was donated to ​?

Can someone me and plz do the problem

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)