find the sum:x+y+z,y-z,x-y,-x+z
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Answered by
0
Answer is x+y+z
it is so easy
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Answered by
1
Answer:
x+y+z
Step-by-step explanation:
x+y+z+y-z+x-y-x+z=2x+2y+2z-x-y-z
=x+y+x
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