book Maths Puzzle Numerical Ability

SOLVE BY ELIMINATION BY ADDITION SHOW WORK PLEASE
7X-5Y=52
2X+5Y=47

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book Other Question

A diagram that shows the floor plan of a Kitchen. The owners plan to carpet all of the area except for a work space. The work space is represented by a scalene triangle ABC. BA = 1 x^2 + 3y if x= -1/2 and y= -5/6