Question 994507
<pre>
CAR            speed       time        distance
Fast Later       50        t             d
Slow Early       40        t+1/2         d

Important to understand, {{{d<>145}}}
</pre>


{{{system(50t=d,40(t+1/2)=d)}}}


{{{50t=40(t+1/2)}}}
{{{5t=4(t+1/2)}}}
{{{5t=4t+2}}}
{{{highlight(t=2)}}}