exam Maths Puzzle Numerical Ability

x + y=2

-3x +4y=36

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exam Other Question

determine the lcd:can you show me step by step so i can finish the rest? thanks!

4 over x^2 - 6x minus 5 over x^2 - 36

7 over 4x^2y^6 plus 1 over 7x^3y^4 Solve by substitution 3x -y =-7 and x+ y = -9