One step equations
I'm working on this y + 5=-12 answer says y=-17 I did 12-5 which equaled 7. Your answer says 17,do I carry the 1 down to make it 17? to get the answer -17?
Karin from Algebra Class says:
Thank you for asking this great question! No, we don't carry a one. Take a look:
y+5 = -12
First we will remove the 5 from the left hand side by subtracting 5 from both sides.
y + 5 - 5 = -12 - 5
Now we are left with:
y = -12 - 5
Now, if this problem were 12 - 5, your answer of 7 would be correct. However, the problem is
-12 - 5.
So, we can rewrite -12 - 5 as -12 + (-5) because subtraction is the same as adding the opposite.
-12 + (-5) = -17 since we are adding two negative numbers, our answer is negative.
So, we got our answer of -17, by computing
-12 - 5, which is -17.
y = -17
Your only mistake is a computation error involving integers. You may want to go back and review all of the integer rules in the basic algebra section:
Thanks for submitting your question.
Best of luck to you!
Need More Help With Your Algebra Studies?
Get access to hundreds of video examples and practice problems with your subscription!
Click here for more information on our affordable subscription options.
Not ready to subscribe? Register for our FREE Pre-Algebra Refresher course.