Question 237712
Steps:
a. Get all x terms on one side.
b. Add or substract them (depending on the problem).
c. Divide the coefficient on both sides of the eqn to find x.
.
Problem:
{{{2x=-x+9}}}
{{{2x+x=9}}}
{{{3x=9}}}
{{{x=9/3}}}
Can you simplify 9/3?  Yes.
I'll let you finish it since this is the last step. :)