On the return journey, the uphill journey is 2x- 14km, and the downhill journey is x km.
x/28+(2x- 14)/35+ 12/60 =(2x- 14)/28+x/35
(x- 14)/35+ 12/60 =(x- 14)/28
(x- 14)( 1/28- 1/35)= 12/60
(x- 14)( 1/ 140)= 12/60
x- 14=24
X = 38km km
2x-14 = 62km
So when we went, it was 38 kilometers uphill and 62 kilometers downhill.
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