Determine the numerical value of the triangle:
If
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Determine the numerical value of the triangle:
If
To solve this problem, we'll follow these steps:
Step 1: Identify the given information
Step 2: Rearrange the equation to solve for
Step 3: Perform the subtraction to find
Now, let's work through each step:
Step 1: The problem gives us the equation . We need to find the value of .
Step 2: To isolate , we subtract 8 from both sides of the equation: .
Step 3: Perform the subtraction, .
Therefore, the solution to the problem is .
Add fifty units to the number 31.
What is the resulting number?
Because subtraction is the opposite of addition! When you see , the 8 is being added to the triangle, so you subtract 8 from both sides to undo that addition.
Absolutely! The triangle is just a symbol representing an unknown number, just like x, y, or any other variable. The solving process stays exactly the same.
It's the same equation! Addition is commutative, meaning . You'd still subtract 8 from both sides to get .
Replace the triangle with your answer in the original equation. If , then . Since this is true, your answer is correct!
Negative answers are completely normal in algebra! For example, if you had , then . Just remember to check your work by substituting back.
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