х*7=49
х=49:7
х=7
64:х=8
х=64:8
х=8
81:х=9
х=81:9
х=9
х*3=12
х=12:3
х=4
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х*7=49
х=49:7
х=7
64:х=8
х=64:8
х=8
81:х=9
х=81:9
х=9
х*3=12
х=12:3
х=4