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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

Sagot :

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) = 381

Solve the previous equation for x, as follow:

x + x + 1 = 381 simplify like terms

2x + 1 = 381 subtract 1 both sides

2x = 381 - 1

2x = 380 divide by 2 both sides

x = 380/2

x = 190

Then, the numbers are 190 + 191