If b=4 and c=2, what is 2b-3c?

First, fill in the variables with the numbers given so that

2b-3c

will then become

2 (4) - 3 (2)

next, you refer to the order of operations to simplify the problem down, the multiplication being the first doable operations in this problem.

8-6

and next operation being subtraction.

2

is the final answer

2 x 4 = 8

3 x 2 = 6

8 - 6 = 2

2 is the answer