Question 502821
{{{ 2x - 3*(-2x+4 ) = -13 + x  }}}
Expand the 2nd term, {{{ -3*( -2x + 4 ) }}}
{{{ 2x + 6x- 12 = -13 + x }}}
Subtract {{{x}}} from both sides
{{{ 8x - x - 12 = -13 }}}
Add {{{12}}} to both sides
{{{ 7x = -1 }}}
{{{ x = -1/7 }}}
I get your answer with a minus sign