Question

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

Answer 1

2 x 4 = 8
3 x 2 = 6

8 - 6 = 2

2 is the answer

Answer 2

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