#1
i always see this type of question on tests and i don't know how to do it:
Eg., Find two consecutive integers whose sum is 89.

How do you solve for it? cause i usually just guess lol

thanks in advance
#4
an Integer is a whole number

lol wat

DIEDIT - didn't read 'concecutive'
Last edited by DieGarbageMan at Jul 30, 2009,
#5
x+x+1=89
2x+1=89
2x=88
x=44

44, 45

Quote by DieGarbageMan
an Integer is a whole number

80 and 9 i assume would be correct.


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#8
44 and 45.. it means numbers that follow on from each other.. it usually involves halving it.


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#9
Quote by DieGarbageMan
an Integer is a whole number

lol wat

DIEDIT - didn't read 'concecutive'

hahahaha for laughing at me... ha.
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#12
Boy. You'll hate proofs in whatever the equivalent of Math C30 is where you live. :p
#14
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#15
This is how I usually solve a problem like this:

80/2= 40
Two consecutive integers that = 9 are 4 and 5

40 + 4= 44
40 + 5= 45

44+ 45= 89

But this is a bit more difficult than a simple equation.

2x + 1 = 89
2x= 88
x= 44

44 + ?= 89
45
Last edited by JayRich88 at Jul 30, 2009,
#16
this should be in the only maths science thread.*reported* but here is a full method anyway cos i'm a nice chap

2 integers, call them a and b, with a<b add to make 89
=> a+ b = 89
since they are consecutive
=> a+1 = b
=> 2a + 1 = 89
=> a = 44
=> b = 45
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