Question 1059914
You can think of this as one of them standing still and
the other one traveling at the sum of their speeds
Use this to find the time when they meet
{{{ 122 = ( 120 + 90 )*t }}}
{{{ t = 122/210 }}} 
{{{ t = 61/105 }}}
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Don's distance traveled:
{{{ d[1] = 120*(61/105) }}}
{{{ d[1] = 69.714 }}} km
Brad's distance traveled:
{{{ d[2] = 90*(61/105) }}}
{{{ d[2] = 52.286 }}} km
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check:
{{{ d[1] + d[2] = 69.714 + 52.286 }}}
{{{ d[1] + d[2] = 122 }}}
OK
Feel free to get another opinion, too