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Let x be the number of pecans Clara ate.
Since she ate 3 almonds for every 1 pecan, she ate 3x almonds.
According to the information given, she ate 10 more almonds than pecans, so:
3x = x + 10
2x = 10
x = 5
So, Clara ate 5 pecans and 3 x 5 = 15 almonds.
Altogether, she ate 5 + 15 = 20 nuts.