how do i solve this problem?

a= 3
b=7
c=10
d=11

a-b/c-d =

(a-b)/(c-d) =

a-b/(c-d) =

a-(b/c-d) =

There are four problems. Each one asks you to compute a number using a different formula. The way you have written the formulas, more parentheses are needed to clarify things.

For example.
if a-b/c-d = a - (b/c) -d, the answer is 3 - (7/10) -11 = -8.7

You should be able to do the others.