Help me with this please!!

Me. drysdale earned 906.25 in interest in one year on money that he had deposited in his local bank if the bank paid an interest rate of 6.25% how much money did mr. drysdale deposit

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?