Объясни решение уравнение и их проверку:
a) ו9=4500. b) ו3+5000=17000
×=4500:9. ו3=17000-5000
×=500. ו3=12000
Проверка. ×=12000:3
500•9=4500. ×=4000
4500=4500. Проверка
4000•3+5000=12000+5000=17000
17000=17000
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