Question 1197168
<pre>
PERSON       QUANTITY
A              2x
B              3x
C              8x=3x+120
SUM            ?
</pre>


Note that the sum asked for is 13x.


{{{8x-3x=120}}}
{{{5x=120}}}
{{{x=120/5}}}
{{{x=24}}}


{{{13x=13*24}}}

{{{13x=highlight(312)}}}