A car journey of 380 km lasts 4 hours. Part of this is on a motorway at an average speed of 110kmh^-1, the rest on country roads at an average speed of 70kmh^-1.
(i) Write this information as pair of simultaneous equations.
(ii) Solve you equations to find how many kilometres of the journey is spent on each type of road.
So, I know what the answers are but I can't figure out how to get to it myself. Please will you help by showing me how?

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so there are your 2 equations

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