Asked by Sara
Did I do this right? Just want to make sure.
15 = r-1
+ 6 +6
r = 21
15 = r-1
+ 6 +6
r = 21
Answers
Ms. Sue
You need to get the unknown on one side of the equation and the known on the other side.
15 = r-1
Add 1 to both sides of the equation.
15 + 1 = r -1 + 1
16 = r
Here's how we can prove it.
Substitute 16 for r.
15 = 16 - 1
Yep. We have the right answer.
15 = r-1
Add 1 to both sides of the equation.
15 + 1 = r -1 + 1
16 = r
Here's how we can prove it.
Substitute 16 for r.
15 = 16 - 1
Yep. We have the right answer.
Sara
Thank you Ms. Sue for the explanation. I'm sorry, I accidentally wrote -1 instead of -6. It was supposed to be 15 = r-6.
Ms. Sue
Your original answer of 21 is correct. :-)
Sara
thank you, and sorry once again for my mistake.
Ms. Sue
You're very welcome.
We're all human and make typos and other mistakes. :-)
We're all human and make typos and other mistakes. :-)