​ F(1) =-3 f(1)=−3 f(n)=2⋅f(n−1)+1 ​ f(2)=

What is the last question i don’t see it?

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!