Amanda Y. answered 02/03/15
Tutor
New to Wyzant
Math Statistics and Data Analysis
8W plus something should equal 17W so 17W - 8W = 9W
16N minus something should equal -5N so 16N - ? = -5N
-5N + ? = 16N
16N + 5N = 21N
8W + 9W +16N - 21N = 17W - 5N