Question

The expression p(3-0.5x) is equivalent to the expression -24=qx. In these expressions, p and q are rational numbers. What is the value of q?

Answer 1

you can simplify the second equation to $-24/q = x$
and expand the first equation to 
$3p - 0.5 xp$
and then you substitute x to give you $3p + 12p/q$
But without the other side of the first equation you can't go any further. Hope that helped.