Add the last 2 equations to get x=1/2.
The z = -1/2
And y = x-7 = (1/2)-7
Sarah C.
asked 07/22/19x-y= 7
x-z=1
x+z=0
Add the last 2 equations to get x=1/2.
The z = -1/2
And y = x-7 = (1/2)-7
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