It will be 6 cause it is going by 1+ 1,2,3,4,5,6 (if it was 1,3,6,9, it will be 12 cause it is going by 3+) so answer is 6
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I think x = 2 is the answer
You just have to multiply 2 by 99, so the answer is 198.
I'm pretty sure it depends what kind of triangle it is
