exam Maths Puzzle Numerical Ability

5x - 3y = 15; (5, 2). Please help

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exam Other Question

6 squared + 7 squared = c squared the denominator must be changed to a multiplier of 4.
4cube 5x^8y^3 / 4cube 27x^2. Why would it be multiplied by 4cube 3x^2 / 4cube 3x^2? 27 x 3 = 81, not a multiplier of 4. Than