Question

В выражении *** • 9* = *2** нужно заменить звёздочки цифрами так, чтобы получилось верное равенство .( Первые звёздочки в числах заменяются на цифры, отличные от нуля.) Сколько существует различных решений. А. 1 Б. 2 В. 4 Г. 6 ( ОТВЕТ ОБЬЯСНИТЕ ПОЖАЛУЙСТА!!!)

Answer 1

100•92=9200
101•92=9292
102•91=9282
103•90=9270
Итого: 4 различных решения. Ответ: В
Объясняю: Подставил в первые 3 звёздочки число 100 и умножил на 90 таким образом получился ответ 9200, так как имеется цифра 2 просто заполнил остальные звёздочки подходящими цифрами. Все остальные делаются аналогично и в итоге получится четыре различных решения. Удачи! По моему, очень легкое задание.

Answer 2

Task Explanation

The task requires solving the expression * • 9* += *2 by replacing the asterisks with digits to make the equation true. The first asterisks in the numbers should be replaced with non-zero digits. The question also asks for the number of different solutions.

Solution

To solve the expression * • 9* += *2, we need to find the suitable digits to replace the asterisks in the expression. Let's break down the expression and solve it step by step.

Step 1: Breakdown of the Expression

The expression to solve is: * • 9* += *2

Step 2: Replace Asterisks with Digits

We need to replace the asterisks with digits to make the equation true. The first asterisks in the numbers should be replaced with non-zero digits.

Let's start by replacing the first asterisk in the first number: - * * * • 9* += *2** - 1 * * • 9* += *2** (Assuming the first asterisk is replaced by 1)

Now, let's replace the second asterisk in the first number: - 1 * * • 9* += *2** - 1 2 * • 9* += *2** (Assuming the second asterisk is replaced by 2)

Finally, let's replace the third asterisk in the first number: - 1 2 3 • 9* += *2** (Assuming the third asterisk is replaced by 3)

Now, let's check if the equation holds true for any of these combinations.

Step 3: Verify the Solutions

Let's verify the solutions: - 123 • 9* += *2** - 123 • 9* += 92 (Assuming the second asterisk is replaced by 2) - 123 • 92 += 92 (Assuming the third asterisk is replaced by 3)

Based on the verification, it seems that the equation holds true for the combination where the first asterisk is replaced by 1, the second asterisk is replaced by 2, and the third asterisk is replaced by 3.

Conclusion

The correct solution for the expression * • 9* += *2 is: - 123 • 9* += 92

Therefore, there is 1 different solution for the given expression.