SOLUTION: The sum of twice a number and -6 is nine more than that the opposite of the number. Find the number.
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Question 330614: The sum of twice a number and -6 is nine more than that the opposite of the number. Find the number.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Let x = "a number"
then
-x = "opposite of the number"
:
The sum of twice a number and -6 is nine more than that the opposite of the number.
2x + (-6) = -x + 9
2x + x = 9 + 6
3x = 15
x =
x = 5
:
:
Check solution in original equation
2(5) - 6 = -5 + 9
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