SOLUTION: this is my problem. -10-(-12)+(-7)-4 (this is how I worked it. -10+(12)+(7)+ -4 2 +7 +-4 9+ -4= 5. I know the answer is -9 but im not sure what step I am missing. I k

Algebra ->  Signed-numbers -> SOLUTION: this is my problem. -10-(-12)+(-7)-4 (this is how I worked it. -10+(12)+(7)+ -4 2 +7 +-4 9+ -4= 5. I know the answer is -9 but im not sure what step I am missing. I k      Log On


   



Question 315650: this is my problem.
-10-(-12)+(-7)-4 (this is how I worked it.
-10+(12)+(7)+ -4
2 +7 +-4
9+ -4= 5.
I know the answer is -9 but im not sure what step I am missing. I know that if there is a negative you do the opposite, but this confuses me on the
(-12)+(-7)-4. I thought that if there is a plus sign you leave it alone and only change negative numbers. please explain. Thank you in advance for the help.
shanda

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
this is my problem.
-10-(-12)+(-7)-4
-------
-10+(12)+(-7)+ -4
-------
-10+12-7-4
---
-10-7-4 + 12
---
-12 + 12
---
-9
=================
Cheers,
Stan H.