Problem Statement:
(_5) (_8)=(_8) ( )

Explanation:
To solve this problem, we need to determine the missing number in the equation (_5) (_8) = (_8) ( ).

Solution:
To find the missing number in the equation, let's break down the given equation step by step.

Step 1: Understand the equation
The equation contains two sets of parentheses with numbers inside them. We need to find the missing number in the second set of parentheses.

Step 2: Simplify the equation
Let's simplify the given equation to understand it better.
(_5) (_8) = (_8) ( )

Step 3: Understand the operation
Looking at the equation, we can see that the operation being performed is multiplication. The numbers inside the parentheses are being multiplied.

Step 4: Analyze the equation
To solve the equation, we need to analyze the numbers given in the equation.

In the first set of parentheses, we have (_5) (_8). This means that some number is multiplied by 5 and then multiplied by 8.

In the second set of parentheses, we have (_8) ( ). This means that some number is multiplied by 8, but we need to determine what that number is.

Step 5: Solve the equation
To find the missing number in the equation, we can use inverse operations.

Since the first set of parentheses multiplies the number by 5 and then by 8, we can use the inverse operation of multiplication to find the missing number.

To undo the multiplication by 8, we divide both sides of the equation by 8:
(_5) (_8) / 8 = (_8) ( ) / 8

Simplifying:
(_5) = _ ( )

Step 6: Finalize the answer
From the equation (_5) = _ ( ), we can see that the missing number is 5.

Therefore, the final solution to the equation (_5) (_8) = (_8) ( ) is 5.

(-5) + (-8) = (-8) + (-5)