Math help please!!!!!!!! :]

can someone please help me with these 2 problems thanks :]

10.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

A)11y + 4z = 6
2y + 5z = 3

B)y - 2z = 6
-8y - z = 3

C)3y + 3z = -3
11y + 4z = -6

D)-9y + z = -3
-y + 2z = -6


11.If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the first and third equations, then the second and third equations.

x - y + 2z = -2
2x + 2y + z = 7
3x + 3y - z = 3

A)2x + 2y = 7
3x + 3y = 3

B)2x + 2y = 7
5x + 5y = 10

C)7x + 5y = 4
3x + 3y = 3

D)7x + 5y = 4
5x + 5y = 10

10.........D

11.........D

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