Explanation:
In order to get a letter alone, you have to do the opposite of what's currently being performed, and you have to do it on both sides of the equal sign
11.)
Since the a is being divided by 8, that means we have to multiply by 8 on both sides. This gets the a alone. 14x8= 112, meaning
a = 112
12.)
Since the p is being multiplied by 20, that means we need to divide by 20 and on both sides. Gets P alone, and 200 divided by 20 is 10, meaning
p = 10