Answer:
16
Step-by-step explanation: First, you have to plug in the numbers you already know. Since b=5 and c=12, your new equation would be 20 divided by 5 + 12. In this case, because of pemdas, you would divide 20 and 5 first. That leaves you with the equation: 4 + 12. Now from there, it's simple addition creating your answer, 16.
