Question
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.
Answers
Neil
Find three consecutive integers such that the sum of the smallest and largest integer is equal to twice the middle number
Reiny
number of males --- x
number of females --- 3x-5
Can you form the equation from here and solve it?
number of females --- 3x-5
Can you form the equation from here and solve it?
Reiny
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
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