[tex]6(x+5)-3(x-2)=12x+18\\\\6\times x+6\times5-3\times x-3\times(-2)=12x+18\\\\6x+30-3x+6=12x+18\\\\3x+36=12x+18\ \ \ \ \ |subtract\ 36\ from\ both\ sides\\\\3x=12x-18\ \ \ \ |subract\ 12x\ from\ both\ sides\\\\-9x=-18\ \ \ \ \ |divide\ both\ sides\ by\ (-9)\\\\\boxed{x=2}[/tex]
