How do i solve this math problem:
-q - 3 = 7

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

How do i i solve this equation? -18 = x/3 + 3