how would i set up the equation??
2007-10-04 13:06:02 · 11 answers · asked by princesskam1 3 in Science & Mathematics ➔ Mathematics
2n + (2n + 2) + (2n + 4) = 18
6n = 12
n = 2
4 , 6 , 8 is answer
2007-10-07 21:30:04 · answer #1 · answered by Como 7 · 0⤊ 0⤋
4+6+8=18
2007-10-04 13:10:05 · answer #2 · answered by anna 1 · 0⤊ 0⤋
divide 18 by 3
6 is the mean of the 3 numbers
so 4+6+8=18
2007-10-04 13:10:25 · answer #3 · answered by X_nOmAd_oo57-ha 3 · 0⤊ 0⤋
x = first even integer
x + 2 = second even integer
x + 4 = third even integer
Add the expressions above (sum of ....)
x + x+2 x+4 = 18
Combine similar terms:
3x + 6 = 18
Subtract both sides of the equation by 6:
3x = 12
Divide both sides of the equation by 3
x = 4 (first even integer)
x + 2 = 6 (second even integer)
x + 4 = 8 (third even integer)
2007-10-04 13:13:04 · answer #4 · answered by edith p 3 · 0⤊ 0⤋
let: n1= x+1
n2= x+2
n3= x+3
n1+n2+n3=18
x+1+x+2+x+3=18
3x+6=18
3x=18-6
3x=12 divide both sides by 3 to get the value of x
x=4 :)
2007-10-04 13:11:59 · answer #5 · answered by Ross 1 · 0⤊ 0⤋
4, 6 , 8
2007-10-04 13:09:38 · answer #6 · answered by mathmos_man 1 · 0⤊ 0⤋
x+(x+2)+(x+4) = 18
3x + 6 = 18
3x = 12
x = 4
(x+2) = 6
(x+4) = 8
Check: 4+6+8 = 18; TRUE
2007-10-04 13:08:40 · answer #7 · answered by "Steve Jobs" 3 · 1⤊ 0⤋
you know that 3 numbers are consecutive.
the 3 numbers add up to 18.
so, n+n+1+n+2 = 18. n is the lowest number. add one to get the next number. add one more, or n+2 to get the largest number.
This is the same as 3n+3=18
2007-10-04 13:09:43 · answer #8 · answered by dogmanice 2 · 0⤊ 0⤋
4, 6, 8
not sure about the equation part.
2007-10-04 13:14:09 · answer #9 · answered by wife2denizmoi 5 · 0⤊ 0⤋
x+(x+2)+(x+4)=18
tke out the brackets to get
x+x+2+x+4=18
3x+6=18
3x=12
x=4
numbers are 4,6,8
2007-10-04 13:11:11 · answer #10 · answered by adriantheace 4 · 0⤊ 0⤋