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If x+y+z = 7, 2x-y+z = 4 Then 11y-10x = ??

+1 vote
138 views

If
x+y+z = 7
2x-y+z = 4
Then
11y-10x = ??

posted Apr 24, 2015 by anonymous

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1 Solution

+4 votes

By trial and error
We get x=1 y=2 z=4
So 11*2 - 10*1 = 12
12 is the answer or 3z

solution Apr 24, 2015 by Jaspalsingh Parmar
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