exam Maths Puzzle Numerical Ability

Preform the indicated operation: 4/(x -6) + 3/(2x- 6)

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exam Other Question

Maria finished with 180 percent of what she started with. If she finished with 7200, how many did she start with? Can someone show me how to Multiply and then simplify the product. All variables represent positive real numbers. Thanks

(7+2 3 into √6)(7- 3 into √6) (square root).