if (1/5)n:16=256:20n,what is the value of n?
(1/5)n:16=256:20n cross-multiply
(1/5)(20)n^2 = 16*256
4n^2 = 16*256 divide both sides by 4
n^2 = 4 *256 take the square roots of both sides
n = (+/-)sqrt(4)*sqrt(256)
n= (+/-) 2*16
n = (+/-)32
