Question

solve????
x+y=5
x+2z=6
y+3z=4

Answer 1

1. Solve the first equation for x.
2. Then substitute that into x of the second equation.
3. Now the second equation has only y and z.
4. The third equation also has only y and z.
5. Solve these two equations for y and z.
6. Then substitute y into the first equation to get x.

Answer 2

how do you solve x+y=5
and get the answer for X?

Answer 3

Subtract y from both sides.

Answer 4

x + y = 5
- y - y
-------------
x = 5 - y
Now that you know that x = 5 - y, replace the x of the second equation with 5 - y.

Answer 5

so igot z=5 y=-5 and x=10 is that right?

Answer 6

That solution does not work in the second equation.

Answer 7

use elimination process:
x + y = 5
x + 2z = 6
----------- (-)
y - 2z = -1
y + 3z = 4
----------- (-)
-5z = -5
z = -5/(-5) = 1

y + 3z = 4
y + 3(1) = 4
y = 4 - 3 = 1

x + y = 5
x + 1 = 5
x = 5 - 1 = 4

so, x = 4, y = 1, z = 1

Answer 8

Oh. Man I wonder what I did wrong???