Posted by Hossein on Thursday, January 20, 2011 at 7:49am.
There are 51 students in a certain class. The number of females is 5 less than 3 times the number of males. find the number of females and the number of males in the class.

algebra  Neil, Thursday, January 20, 2011 at 7:55am
Find three consecutive integers such that the sum of the smallest and largest integer is equal to twice the middle number

algebra  Reiny, Thursday, January 20, 2011 at 8:47am
number of males  x
number of females  3x5
Can you form the equation from here and solve it?

FOR NEIL algebra  Reiny, Thursday, January 20, 2011 at 8:52am
Please do not post a new question as a reply to somebody else's problem.
Tutors might think it has been answered and not look at it.
I will set it up for you...
1st integer  x
2nd integer x+1
3rd integer x + 2
"smallest plus largest equals twice the middle"
x + (x+2) = 2(x+1)
solve....
ahhh, glancing at this equation it is obvious that you will get
0=0
that means that it will be true for all consecutive even integers.
e.g. let's try 4,5,6
is 4+6 = 2(5) ? YES
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