I need help in learning how to solve this equation using substitution: -x -y -z = -8
-4x + 4y + 5z = 7
2x + 2z = 4

x=3, z=-1, y=6

Step-by-step explanation:

you need to make the coefficients of each variable equal to each other then subtract 2 equations.

this one: multiply -4 in 1st

4x+4y+4z=32

-4x+4y+5z=7

8x+0-z=25

we have 2 equations with 2 variables now

2x+2z=4

8x-z=25

answer: x

step-by-step explanation:

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer