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Find three consecutive even integers so that the twice the sum of the second and third is twelve less than 6 times the first.

2006-06-19 13:39:03 · 5 answers · asked by Anonymous in Science & Mathematics Mathematics

5 answers

three consecutive even integers are
x, x+2 and x+4

Equation is
2((x+2)+(x+4)) = 6x - 12

Solving for x
x = 12
So, 12, 14 and 16

2006-06-19 13:43:10 · answer #1 · answered by quietfive 5 · 0 0

Well, since the 3 even integers are consecutive, let's use x, x+2, and x+4.
So:

6x-12=2(x+2+x+4)
6x-12=2(2x+6)
6x-12=4x+12
6x-4x=12+12
2x=24
x=12
x+2=14
x+4=16

So the three integers are 12, 14, and 16.

2006-06-19 14:05:01 · answer #2 · answered by Science_Guy 4 · 0 0

x = first integer
x + 2 = second integer
x + 4 = third integer

2[(x + 2) + (x + 4)] = 6x - 12
2(2x + 6) = 6x - 12
4x + 12 = 6x - 12
24 = 2x
12 = x

The integers are 12, 14, and 16

2006-06-19 16:32:14 · answer #3 · answered by jimbob 6 · 0 0

x, x + 2, x + 4

2((x + 2) + (x + 4)) = 6x - 12
2(x + 2 + x + 4) = 6x - 12
2(2x + 6) = 6x - 12
4x + 12 = 6x - 12
-2x = -24
x = 12

ANS : 12, 14, and 16

2006-06-19 13:54:33 · answer #4 · answered by Sherman81 6 · 0 0

x, y, and z

y = x+2
z = y+2
z = x+4
2y + 2z + 12 = 6x

right?

If so,

2y + 2z + 12 = 6x can be translated into 2x + 4 + 2x + 8 + 12 = 6x.

4x + 24 = 6x
2x = 24
x = 12

So they ARE 12, 14, and 16...

2006-06-19 14:05:44 · answer #5 · answered by Anonymous · 0 0

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