Determine the numerical value of the triangle:
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Determine the numerical value of the triangle:
To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: We start with the equation . To isolate , subtract 79 from both sides:
.
Step 2: Simplify the result:
.
Therefore, the numerical value of the triangle is . This corresponds with choice 3.
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
Because 79 is being added to the triangle, you need to do the opposite operation (subtraction) to cancel it out. This is the key principle of solving equations!
The triangle is just a placeholder for an unknown number, like using x or y. The solving process stays exactly the same - isolate the unknown by doing opposite operations.
Absolutely! Since , you can see that the triangle must equal 1. But showing the algebraic steps helps you solve harder problems later.
Negative answers are completely valid! For example, if the equation was , then would be correct.
Substitute your answer back into the original equation. If is true, then your answer is correct!
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