Question 330614
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 = {{{15/3}}}
x = 5

:
:
Check solution in original equation
2(5) - 6 = -5 + 9