SOLUTION: Solve and graph the solution set. 3x>7x + 20. Please help me. I struggle with graphs. Thank you.

Question 26796: Solve and graph the solution set. 3x>7x + 20.
Please help me. I struggle with graphs.
Thank you.
Answer by elima(1433) (Show Source): You can put this solution on YOUR website!
Hi, I hope I can help!
3x>7x+20
First of all you need to get the x on one side, so you subtract 7x form both sides;
3x-7x>7x+20-7x
-4x>20
Now divide each side by -4, remember whenever you divide or multiply a negative number you change direction of sign;
<
x<-5
Now to graph this you will draw a circle around -5 and a solid line to the left covering -6,-7,-8,etc. It's becuase, all those numbers satisfy the equation not including the -5.
Hope you understand
=)
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