SOLUTION: Three times the sum of some number plus 3 is equal to six times the number minus fifteen. I wrote the equation as 3(x+3)=6(x-15) but it is not coming to the answer I need. The a

Algebra ->  Equations -> SOLUTION: Three times the sum of some number plus 3 is equal to six times the number minus fifteen. I wrote the equation as 3(x+3)=6(x-15) but it is not coming to the answer I need. The a      Log On


   

Question 342441: Three times the sum of some number plus 3 is equal to six times the number minus fifteen.
I wrote the equation as 3(x+3)=6(x-15) but it is not coming to the answer I need. The answer I need is 8. How do I get there?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The equation is actually 3%28x%2B3%29=6x-15.


3%28x%2B3%29=6x-15 Start with the given equation.


3x%2B9=6x-15 Distribute.


3x=6x-15-9 Subtract 9 from both sides.


3x-6x=-15-9 Subtract 6x from both sides.


-3x=-15-9 Combine like terms on the left side.


-3x=-24 Combine like terms on the right side.


x=%28-24%29%2F%28-3%29 Divide both sides by -3 to isolate x.


x=8 Reduce.


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Answer:

So the answer is x=8


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