exam Maths Puzzle Numerical Ability

The solution to the system of equations below is: 3x+4y=-6, x-5y=17

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exam Other Question

I missed class due to an illness and I don,t understand how to do this one. could you help me? I am stuck on correct answer for:

If x is directly proportional to y and x = 3 when y = 8, what is the value of x when y = 2

I am not using a specific book. I am just practicing...