18 plus 20 is 38 how could you not know that,it is such an easy question
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16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
18 + 10 + 20 + 30 + 15 + 50= 143
32+14+20+18+16+31+21+16=168
2 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 106
The sum of 20 added to itself 20 times is calculated by multiplying 20 by 20, resulting in 400. Therefore, the answer to the given equation is 400.