[tex]-6q+5.8=23.8\ \ \ |subtract\ 5.8\ from\ both\ sides\\\\-6q+5.8-5.8=23.8-5.8\\\\-6q=18\ \ \ \ |divide\ both\ sides\ by\ (-6)\\\\-6q:(-6)=18:(-6)\\\\\huge\boxed{q=-3}\leftarrow\boxed{answer\ b}[/tex]
[tex]check:\\subtitute\ the\ value\ of\ the\ "q"\ to\ the\ left\ ides\ of\ the\ equation\\\\L=-6(-3)+5.8=18+5.8=23.8=R\ \ \ correct\ :)[/tex]
