Determine the numerical value of the triangle:
We have hundreds of course questions with personalized recommendations + Account 100% premium
Determine the numerical value of the triangle:
To determine the value of the triangle, we begin with the equation given:
We want to isolate . To do so, we subtract 7 from both sides of the equation:
This simplifies to:
Thus, the 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?
Since the equation shows triangle + 7, you need to do the opposite operation to isolate the triangle. Adding 7 would give you triangle + 14, moving you further from the answer!
The triangle is just a placeholder for an unknown number, like using x or y. It could be any variable symbol - the solving process stays the same!
Look at what's being done to your variable. If something is added, subtract it. If something is subtracted, add it. Always do the opposite!
Yes! Besides substituting back, you can also work backwards: Start with your answer (3), add 7, and see if you get 10. Multiple checking methods build confidence!
Negative answers are completely valid in algebra! For example, if , then triangle = -7. Always trust your math and verify by checking.
Get unlimited access to all 18 Natural Numbers around 100 questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime