A cafe only sells two types of sandwiches, turkey, and steak. The cafe charges $4 for turkey sandwiches and $6 for steak sandwiches. Last month, the cafe sold $4524 worth of sandwiches. The cafe sold a total of 925 sandwiches.How many turkey sandwiches did they sell?

t + s = 925....s = 925 - t
4t + 6s = 4524

4t + 6(925 - t) = 4524
4t + 5550 - 6t = 4524
-2t = 4524 - 5550
-2t = -1026
t = 1026/2
t = 513 <== 513 turkey sandwiches

t + s = 925
513 + s = 925
s = 925 - 513
s = 412 <=== 412 steak sandwiches