128 students represent x percent of the boys at a school . if the boys at the school make up 50 % of the total school population of x students , what is x ?
let b be the number of boys in the school . 128 = xb / 100 b = 0.5 x 12800 = 0.5 x ^ 2 x ^ 2 = 25600 x = 160 the answer is a .
sqrt(divide(multiply(128, const_100), divide(50, const_100)))