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When a book is open to pages 68 and 69, the sum of the page numbers is 137. If you wanted to solve a problem like this algebraically, you could call the left-handed page x, and the right-handed page x+1, since you know it's one larger than the left page. Then write x + (x + 1) = 137. Subtract 1 from each side and you have x+x =136 or 2x = 136. Dividing both sides by 2, we have x = 68, so the left page is 68 and the right is 69.
5x2 - 136 = 44 5x2 - 136 + 136 = 44 + 136 5x2 = 180 5x2/5 = 180/5 x2 = 36 √x2 = √36 x = ±6
√136 = √(4 x 34) = 2√34
136/2 = 68 degrees.
136 cannot lie between two consecutive whole numbers.