[tex]2x-4+10\cdot(x-1)=5x-6 \\\\2x-4+10x-10=5x-6 \\\\2x+10x-5x=-6 +4+10\\\\7x=8\\\\x=\frac{8}{7} \\\\S=\big\{\frac{8}{7} \big\}[/tex]
