Question

the sum of three numbers is 12 the first number is twice the sum of the second and third. the third number is 5 less the first.?

Answer 1

Let the three numbers be x,y and z.
x+y+z=12.......(1)
x=2(y+z)..........(2)
z=x-5..............(3)
solve these three equations and get the values of x , y and z

Answer 2

thanks nitz.

Answer 3

u are welcome......

Answer 4

nitz, but what if the answer choices dont have x, y in them there numbers

Answer 5

what are the choices.........?

Answer 6

3,6,3 8,1,3 4,1,1 9,1,4

Answer 7

its B
8,1,3

Answer 8

thanks nitz :) you rock

Answer 9

ANY other question....

Answer 10

yess how do you evaluate the determing by using diagonals?

Answer 11

-1,2,2
4,-1,1
3,2,2

Answer 12

sorry i didnt get ur question...........

Answer 13

evaluate the determinate by using diagonals

Answer 14

do you get it ?