8:11 you can solve this without trial and error all the terms with p are to the first power, so since p will not affect anything else, we can ignore terms of a higher or lower power of x. Since we only have 1 order of x, it doesn't matter and we can remove it. This leaves the simple algebra problem 3p-16p-64=-155. A little 8th grade algebra and the answer is shown to be B.
8:11 you can solve this without trial and error
all the terms with p are to the first power, so since p will not affect anything else, we can ignore terms of a higher or lower power of x. Since we only have 1 order of x, it doesn't matter and we can remove it. This leaves the simple algebra problem 3p-16p-64=-155. A little 8th grade algebra and the answer is shown to be B.