4. Теңдеулерді шеш.
а: 15 = 54 : (6 - 3)
55 x + 710 = 820
300 – х = 42×
2 + 50
а: 15 = 54 : (6 - 3)
55 x + 710 = 820
300 – х = 42×
2 + 50
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Ответ:
1) а:15=18
а=270
2) 55х=820-710
55х=110
х=110:55
х=2
3)300-х=134
х=300-134
х=166