We need to subtract 3.17 from 12.08 to find x.
12.08-3.17=8.91
So, C) 8.91
x + 3.17 = 12.08
subtract 3.17 from both sides
x + 3.17 - 3.17 = 12.08 - 3.17
x = 8.91
answer
C) 8.91
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