Given
a &\equiv 1 \pmod{7} \\
b &\equiv 2 \pmod{7} \\
c &\equiv 6 \pmod{7}
what is the remainder when a + b + c is divided by 7?
use an example for a b c to solve this problem
a=1
b=2
c=6
a+b+C=1+2+6 = 9
\(9 \equiv 2 \pmod7\)
answer is 2
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