book Maths Puzzle Numerical Ability

w=1/2 x=3

3w-4x=

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book Other Question

Please help me solve this word problem:Leroy started out in his car at the rate of 50km/h.One hour later,Tina left from the same point driving along the same road at 75km/h.How lon How would i graph this:
y>-x+1 (The > has a line underneath of it)
y<2/3x+2 (The < has a line underneath of it also)

Thanks a bunch in advance!