SOLUTION: Solve the following system of equations. what is the value of z?
x+y+z=1
2x-y+3z=-7
3x+2y+2z=4
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Question 152085: Solve the following system of equations. what is the value of z?
x+y+z=1
2x-y+3z=-7
3x+2y+2z=4
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
adding 1st eqn and 2nd eqn __ 3x+4z=-6 __ multiplying by 2 __ 6x+8z=-12
multiplying 2nd eqn by 2 and adding 3rd eqn __ 7x+8z=-10
subtracting eqns __ x=2
substituting __ 6(2)+8z=-12 __ subtracting 12 __ 8z=-24 __ z=-3
substituting __ (2)+y+(-3)=1 __ adding 1 __ y=2
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