Answer:
So the answer would be 20 for 50-[20+[50-40]]
Explanation:
50 - 40 =10 and 20 +10 = 30 so we 50 minus 30 which is 20
If its the other one it is 9 because 3 times 2 is 6 and 8 minus 6 is 2 and 7 plus 2 equals 9
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