Х+7= 20 12+х= 45 х- 7=20 69- х=24 х - 23= 44 х - 38 =26 решить примеры
olga15038
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03.08.2019 09:40
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3
х=20-7
х=13
12+х=45
х=45-12
х=33
х-7=20
х=20+7
х=27
69-х=24
х=69-24
х=45
х-23=44
х=44+23
х=67
х-38=26
х=26+38
х=64
12+33=45
27-7=20
69-45=24
67-23=44
64-38=26