If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation.

2x + 5y - 2z = -1
x + 3y + z = -2
3x - 2y + 3z = -17
Please help do not understand

Question

If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation.

2x + 5y - 2z = -1
x + 3y + z = -2
3x - 2y + 3z = -17
Please help do not understand

psymon · Answer

Well, Im assuming it's telling you to solve for x in the second equation and then substitute that x value into the other two equations, then say the results.

jack1 · Answer

hay @wolfman6642 
when it says "isolate x" it means rearrange the equation so the x is on one side of the equals sign, and all the other values are on the other side

jack1 · Answer

so in this case:
EQN 2: 

x + 3y + z = -2
x                  = - 3y - z  -2

jack1 · Answer

now u can sub that into the others to find x y and z if u want, or use that as ur new series of equations as EQN 2a