exam Maths Puzzle Numerical Ability

In the equation 2xy= (Ay-7)/P, how do you solve for y?

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exam Other Question

identify the center of the circle (x+2)^2+(y-1)^2=9 I got -1,1? Given f(x) = 2x + 5, find f(a - 1).
These are my choices
2a + 3
2a + 4
a + 6
a + 3