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OpenStudy (anonymous):
if the sum of a,b and c is twice the sum of a minus b and a minus c, then a= ?
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OpenStudy (jamesj):
So a+b+c = 2(a-b-c) = 2a - 2b - 2c Now solve for a
OpenStudy (anonymous):
a+b+c=2a-2b-2c -a=-3b-3c a=3b+3c
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