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Tamia Clements
Mathematics
11 September, 23:36
If a + b + c = - 1 and x + y = 7
what is - 9a-7x-9c-9b-7y
+3
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Yadiel Schroeder
11 September, 23:47
0
If a + b + c = - 1 and x + y = 7
what is - 9a-7x-9c-9b-7y
answer:40
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Dereon Stout
11 September, 23:55
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-40
Step-by-step explanation:
-9a-7x-9c-9b-7y
group the terms
-9a-9b-9c - 7x-7y
factor out - 9 and 7
-9 (a+b+c) - 7 (x+y)
replace a+b+c with - 1 and x+y with 7
-9 (-1) - 7 (7)
9 - 49
-40
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