SOLUTION: the sum of three times a number and 7 more than the number is the same as the difference between -11 and twice the number. what is the equation and the number?

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Question 902699: the sum of three times a number and 7 more than the number is the same as the difference between -11 and twice the number. what is the equation and the number?
Answer by Stitch(470) About Me  (Show Source):
You can put this solution on YOUR website!
3X+%2B+%28X+%2B+7%29+=+2X+-+-11
Simplify the equation
4X+%2B+7+=+2X+%2B+11
Subtract 2X from both sides
2X+%2B+7+=+11
Subtract 7 from both sides
2X+=+4
Divide both sides by 2
highlight%28X+=+2%29