SOLUTION: Please can i have help with this question, what is the value of a? 5+3a=a-15

Algebra ->  Equations -> SOLUTION: Please can i have help with this question, what is the value of a? 5+3a=a-15      Log On


   

Question 750763: Please can i have help with this question, what is the value of a? 5+3a=a-15
Answer by timvanswearingen(106) About Me  (Show Source):
You can put this solution on YOUR website!
5%2B3a=a-15
Subtract 5 from both sides:
3a=a-20
Subtract a from both sides:
2a=+-20
Divide both sides by 2:
a=+-10