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 + z = 2
x – 3y + 2z = –1
x + 5y + 3z = –4
Answer
–9y + z = –3
–y + 2z = –6
3y + 3z = –3
11y + 4z = –6
y – 2z = 6
–8y – z = 3
11y + 4z = 6
2y + 5z = 3

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 + z = 2
x – 3y + 2z = –1
x + 5y + 3z = –4
Answer
		–9y + z = –3
–y + 2z = –6
		3y + 3z = –3
11y + 4z = –6
		y – 2z = 6
–8y – z = 3
		11y + 4z = 6
2y + 5z = 3

anonymous · Answer

all you have to do is solve the first equation for x, so then x=-6y-z, then see which one of the solutions gives you the new system after you sub in (-6y-z) for the values of x in the other two equations. that will give you the answer.

hero · Answer

Oh Keke, you can't just substitute x,y, and z this time :P