The left and the right page of numbers of an open book are two consecutive integers whose sum is 381 . Whats are the page numbers

In order to determine the number of page numbers, let x the number of one page and x + 1 the number of the other page.The sum of both numbers is 381, then:x + (x + 1) = 381Solve the previous equation for x, as follow:x + x + 1 = 381 simplify like terms2x + 1 = 381 subtract 1 both sides2x = 381 - 12x = 380 divide by 2 both sidesx = 380/2x = 190Then, the numbers are 190 + 191