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 214413: 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?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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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?
:
3x + (x+7) = -11 - 2x
4x + 7 = -11 - 2x
4x + 2x = -11 - 7
6x = -18
x = -3
;
:
Check solution in original equation
3(-3) + (-3 + 7) = -11 - 2(-3)
-9 + 4 = -11 + 6
-5 = -5