996
996/12=83
9*9*6=486/81=6
996/24=41.5
996/36=26.666
11 2/7 + 4 3/7 - 6 4/7 = 79/7 + 31/7 - 46/7 = 64/7 = 9 1/7
0 - (-72) = 72;
23 - 46 = - 23;
13 - 19 = - 6;
200 - 177 = 23;
22 - (- 83) = 105;
19 - 220 = - 201.
2/9+2/15= 4/24
11/9-2/3=-9/6
9(5х+13)=252
45х+117=252
45х=252-117
45х=135
х=135:45
х=3
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