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hope it helps u.....
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let the speed of one car be x
speed of other car=x+7
total distance=300km
distance between cars after they travel for 2h=34 km
Linear equation=
300-[2(x)+2(x+7)]=34
300-[2x+2x+14]=34
300-4x-14=34
300-4x=48
-4x=-252
x=63 km/h
x+7=70 km/h
speed of one car=63km/h. speed of other car=70 km/h
hope this helps you
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