Determine the numerical value of the triangle:
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Determine the numerical value of the triangle:
Let's solve the problem step by step:
Step 1: Start with the equation provided: .
Step 2: To solve for , isolate it by subtracting 45 from both sides of the equation to maintain equality.
This subtraction gives: .
Step 3: Perform the subtraction on the right-hand side: .
Thus, the numerical value of the triangle () is .
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
You must do the same operation to both sides to keep the equation balanced! Think of it like a scale - whatever you do to one side, you must do to the other to maintain equality.
The triangle () is just a placeholder for an unknown number, like how we usually use 'x' or 'y'. It represents the value we need to find.
Look at what operation is being done to your unknown! If something is being added to it (like +45), use subtraction to undo it. If something is being subtracted, use addition.
You could think of it as "what number plus 45 equals 50?" but the algebraic method with inverse operations works for all equation types, making it the most reliable approach.
Negative answers are completely valid! Always check your work by substituting back into the original equation to make sure both sides are equal.
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