exam Maths Puzzle Numerical Ability

I need to solve this equation if the domain is (-2, -1, 2, 3, 5)

4x + 2y = 10

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exam Other Question

Fred walks 5 miles for every 3 blocks that Roberts walks. They walk a total of 24 blocks. How many blocks does Robert live from school? solve the following:
24g^2-40g=32