exam Maths Puzzle Numerical Ability

A hiker hikes up a mountain 1mph slower than she hikes down the mountain. If it takes her 1.5 hours to hike up the mountain, and only 1 hour to hike down it, how fast does she move each direction?

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exam Other Question
1/4-^^^+3^^/2-^ how could i make a system of equations (2) for this problem: sue is 4 years younger than sally. in 3 years sally will be twice as old as sue. how old are they now?