12 minus 33 is -21.
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60
think of it as 9 + 3, 9 + 3 is 12, so it is 120 + (9 + 3) = 120 + 12 is 132 or a easier way to do it is take 1 away from 33 and add it to the 99 and you get 100 + 32 = 132
22 12+2x = 33 2x = 33-22 = 11
12/33 = 4/11
33