Question 1165931
<pre>
              Fuel Effic.     Volume          DISTANCE

firstcar       x              30              30x

secondcar      y              35              35y

totals        50                             1650
</pre>

{{{system(x+y=50,3x+3.5y=165)}}}-----------solve system in any way you want.



-

{{{system(3x+3y=150,3x+3.5y=165)}}}


{{{EQ2-EQ1}}}:

{{{0.5y=15}}}

{{{y=15*2}}}

{{{highlight(y=30)}}}-------------simple arithmetic will give {{{highlight(x=20)}}}