book Maths Puzzle Numerical Ability

[14 + (-3)]7=14x +__ x 7

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book Other Question

Two trains start at the same time ,one from banglore to mysore and other from mysore to banglore.If they arrive at their destinatiojs one hour and four hours resp. after crossing each other, how mch faster is one train running than the other. What is the turning point, and focus of y= 1/4x2? Also what is its directrix?