Question

1 7 2 — + 8 — = 20 15

Answer 1

172_+8_= 2015 Этот пример нерешаемый, ибо 1720 + 80, ну никак не 2015

Answer 2

To solve the given arithmetic expression, follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Let's apply these rules step by step:

1 7 2 — + 8 — = 20 15

Step 1: Parentheses/Brackets - There are no parentheses or brackets in the expression.

Step 2: Exponents/Orders - There are no exponents or orders in the expression.

Step 3: Multiplication and Division - There are no multiplication or division operations in the expression.

Step 4: Addition and Subtraction (from left to right):

1 7 2 — + 8 — = 20 15

Start from the left:

1 - 7 = -6 -6 + 2 = -4 -4 + 8 = 4

So, the simplified expression becomes:

4 — = 20 15

Now, since there is no number on the left side of the subtraction sign, it's not possible to determine the value of the left-hand side. Also, on the right side, "20 15" doesn't seem to be a valid arithmetic expression.

It appears that there might be a mistake or misinterpretation in the given expression. If you can provide additional context or clarify the expression, I'd be happy to assist further.