The answer is 168,750,000
20,000,000+400,000+80,000+4,000+100+60+3
-2+x+5=3-(1-2x)
-2+5=3-(1-x)
3=3-(1-x)
0=-1-x
0=x
So if you divide the total in half its 162.5. So if they traveled 75km more by bike, you add 75 to that which equals 237.5. So your answer is 237.5