Question

реши уравнение
398+4907:К=405

Answer 1

$398 + 4907 \div k = 405 \\ 398 + 4907 \div k = 405 \: \: . \: \: k = 0 \\ 398 + \frac{4907}{k} = 405 \\ \frac{4907}{k} = 405 - 398 \\ \frac{4907}{k} = 7 \\ 4907 = 7k \\ k = 4907 \div 7 \\ k = 701$