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: Add 8 to both sides of the equation:
Step 2: Simplify the equation:
This means the value of the triangle () that satisfies the equation is .
Therefore, the solution to the problem is .
Add fifty units to the number 31.
What is the resulting number?
Great question! When you see , the 8 is being subtracted from the triangle. To get the triangle by itself, you need to undo that subtraction by adding 8 to both sides.
Think of the triangle as just another letter like x or y! It represents an unknown number that we need to find. The symbol doesn't change how we solve the equation.
Use opposite operations! If you see subtraction in the equation, use addition to solve it. If you see addition, use subtraction. Think: What undoes this operation?
Yes! Besides substituting back, you can think logically: What number minus 8 equals 90? Since , the answer must be 98.
That won't happen with this type of problem! When you have , adding 8 to both sides gives you - the triangle is isolated on one side.
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