How do you find two consecutive odd integers such that 4 times the larger is 29 more than 3 times the larger?

1 Answer
Mar 1, 2016

Page numbers are 27 and 29

Explanation:

color(blue)("Build and expression that guarantees the numbers are odd")

Let any number be n

Then 2n will always be even. So 2n+1 will always be odd
The next odd number will be (2n+1)+2 = 2n+3

So our two consecutive numbers can be represented by

2n+1" and "2n+3

color(green)("Note that the value of n is what I call a seed value.")
color(green)("It is not a page number"!)
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
color(blue)("Building the equation of relationship")

Breaking down the question into its parts

"4 times the larger" " "->color(brown)(4(2n+3))
"is "" " ->color(brown)(4(2n+3)=)
"29 more than "" " ->color(brown)(4(2n+3)=29 +)
"3 times the larger "" "->color(brown)(4(2n+3)=29 +3(2n+3))
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Multiply out the brackets giving:

8n+12=29+6n+9

Collecting like terms

8n-6n=29+9-12

2n=26

n=13 color(green)(" This is the seed value")

color(blue)("The first page is " 2n+1 -> 2(13)+1 = 27

color(blue)("The second page is 2 pages on " -> 27+2=29