Question

The left and right page numbers of an open book are two consecutive integers whose sum is 545 Find these page numbers.

Answer 1

The first number is 272 and the second number is 273

Explanation:

Let x = the first number

Let x+1 = the second number

Consecutive just means two numbers in order like 6 and 7 or 152 and 153.

x + (x+1) = 545 I put the parentheses in so that you can see the first number and the second number. It is not needed, so I will remove

x + x + 1 = 545 Combine the x's)

2x + 1 = 545 Subtract 1 from both sides of the equation

2x = 544 Divide both sides by 2

x = 272 Is the first number, so the second number is 273

Check:

272 + 273 = 545