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!