The left and right page numbers of an open book are two consecutive integers whose sum is 355. Find these page numbers.

177 and 178

Step-by-step explanation:

Let's let the first page number be n. Then the next page number must be (n+1).

And together, we know that they total 355. So:

Combine like terms:

Subtract 1 from both sides:

Divide both sides by 2:

So, the first page number n is 177. And the other is 178.

And we're done!

177 and 178

Step-by-step explanation:

If they are consecutive numbers and add to 355, it means that 2 times their average will also add the 355. So to find their average, we can divide 355 by 2 which gives us 177.5

If we know that this is the number exactly between them and they are consecutive, then we just find the nearest whole number either side: 177 and 178, which gives us our page numbers.

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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