the answer is *67,180*
explanation: first, plug in a (2) and b (5).
12/2(2) (4’2x7) 10(5) - 20
begin to solve, starting with parentheses, exponents, multiplication/division, and then subtraction.
(12 x 112 x 50 - 20)
12 x 112 is 1,344
1,344 x 50 is 67,200
67,200 - 20 is 67,180.
therefore, the answer would be 67,180!
i hope this helped!