SOLUTION: -3x+3y-6z=-21
x-y+2z=7
4x-4y+8z=28
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Question 1015258: -3x+3y-6z=-21
x-y+2z=7
4x-4y+8z=28
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
This system has infinitely many solutions. In fact, the coordinates (x,y,z) of any point on the plane x - y + 2z = 7 will satisfy the system. it is enough to say that the first equation is the second equation multiplied by -3, while the 3rd equation is the second equation multiplied by 4.
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