book Maths Puzzle Numerical Ability

an algebra teacher stated that 2x+1=1 5=2x=14 are equivalent. what was done to the first equation to get the second equation? what is the value of x that makes both equations equal?

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book Other Question

A car travels from A-B @ 60km/h and returns from B-A @ 80km/h. What is 1) Avg distance travelled 2) Avg velocity.
Can there be a solution for this sort of problems? A swimming pool can be filled in 6 h and requires 9 h to drain. If the drain was accidentally left open for 6 h while the pool was being filled, how long did filling the pool require?