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 number

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Question 97631This question is from textbook
: 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 number This question is from textbook

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = "a number"
:
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.
:
3x + (x+7) = 2x - (-11)
4x + 7 = 2x + 11
4x - 2x = 11 - 7
2x = 4
x = 2
:
:
Check solution:
"sum of three times a number and 7 more than the number is the same as the difference between -11 and twice the number."
3(2) + (2+7) = 2(2) - (-11)
6 + 9 = 4 + 11