Question 4246
If you don't like fractions, then begin by multiplying both sides of the equation by 2.


{{{2*13 - 2* (x/2) = 2*x - 2* (1/2)}}}


{{{ 26 - x = 2x - 1 }}}


Add +x to each side:


{{{26 - x + x = 2x + x - 1}}}

{{{26 = 3x - 1}}}

Add +1 to each side:

{{{27 = 3x}}}

Divide by 3:  x = 9