[5 + ? × 19 - 15 - 7]/[13 × 13 - 156] = 6 Pick one.
A) 4  B) 4.5  C) 5  D) 5.5  E) 6.5
(? × 19 - 17)/(169 - 156) = 6   =&gt; ? × 19 - 17 = 13 × 6 = 76   =&gt; ? × 19 = 78 + 17= 
<gadget id="calculator">78 + 17</gadget>
<output>95</output>
95   ?= 95/19= 
<gadget id="calculator">95/19</gadget>
<output>5</output>
5   Answer: Option 5
<result>C</result>
[5 + ? × 19 - 15 - 7]/[13 × 13 - 156] = 6