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 first equation.

x-6y+3z=0
2x-5+8z=7
x+7y-4z=13

a) -17y+14z=7
y-z=13
b) 7y+2z=7
13y-7z=13
c) 13y+7z=-13
-19+16z=-19
d) y-z=-13
9y+0z=-19

I NEED HELP, ITS REALLY URGENT !!

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 first equation.

x-6y+3z=0
2x-5+8z=7
x+7y-4z=13

a) -17y+14z=7
   y-z=13
b) 7y+2z=7
  13y-7z=13
c) 13y+7z=-13
  -19+16z=-19
d) y-z=-13
9y+0z=-19

I NEED HELP, ITS REALLY URGENT !!

amistre64 · Answer

whats x when we isolate it?

anonymous · Answer

wow....

anonymous · Answer

yeah, basically, just isolate x...

amistre64 · Answer

2(6y-3z)-5+8z=7

12y -6z -5'y' +8z = 7

7y ..... id pick b

anonymous · Answer

r u sure :( ?

anonymous · Answer

amistre64 is the Guru, I'm pretty sure his answer is right

amistre64 · Answer

i had to fill in the missing pieces, but yeah :)

anonymous · Answer

So you're more comfortable with it now niti?

anonymous · Answer

By subtracting equation [1] from equation [2] you will get
b) 7y+2z=7 
   13y-7z=13