Hi!
miles needed to have a price of £63:
47 + 0,30 (x-40) = 63
i think we multiply by (x-40) otherwise those first 40 miles will be counted twice
x = 93,6 miles
so if we drive the car for just one more mile, we add 0,30p to the price (£63,30) and the day van is now cheaper
one extra mile makes us drive just about 94 miles
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