Solve for the given variable in the equation: ½ n - 3 = 5

n =

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Precalculus question, image attached.

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units