book Maths Puzzle Numerical Ability

7x-20= 6y

-4x-2y= -44

solve the system

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book Other Question

List 5 ways you can transform equations into equivalent equations. Instructions: For questions 30 and 31 use quadrilateral DEFG inscribed in the circle. If m < GFE = 2x, m < FGD = 2x-12 and m < EDG = 2x + 20 find each measure.
Problems: 1. m < GF