[tex]\begin{gathered} -8(1+x)+7x=-8-8x+7x\text{ Using the distributive propierty} \\ =-8+x(7-8),\text{ Factoring x} \\ =-8-x(-1),\text{ doing 7-8} \\ =-x-8,\text{ reordering the factors} \\ =-(x+8),\text{ factoring the minuts sign} \end{gathered}[/tex]
