SOLUTION: help me solve this please 7a-(a-5)=-10

Algebra ->  Systems-of-equations -> SOLUTION: help me solve this please 7a-(a-5)=-10      Log On


   

Question 678153: help me solve this please 7a-(a-5)=-10
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
7a-(a-5)=-10
Remove the brackets, the minus change the -5 to +5
7a - a + 5 = -10
subtract 5 from both sides
6a = -10 - 5
6a = -15
a = %28-15%29%2F6
a = -5%2F2 or -2.5
:
:
You can check solution in the original problem
7(-2.5) - (-2.5-5) = -10
-17.5 -(-7.5) = -10
minus a minus is a plus
-17.5 + 7.5 = -10