<p>Does anyone have a proper solution for:</p>
<p>If p + pq is 4 times p - pq, which of the following has exactly one value? (pq doesn't equal 0)</p>
<p>A) p, B) q, C) pq, D) p + pq, E) p - pq</p>
<p>Thanks</p>
<p>p + pq = 4(p - pq)
p + pq = 4p - 4pq
-3p = -5pq</p>
<p>Now, divide both sides by (-5p). This is kosher; since pq does not equal 0, p cannot equal 0.</p>
<p>3/5 = q.</p>
<p>So the answer is B: q has exactly one value.</p>
<p>Wow thanks, so obvious yet I didn’t do that last step…</p>