exam Maths Puzzle Numerical Ability

2x+2y=5
y=1/4x

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exam Other Question

Find each product (y-3)(yt5)=y(y) t y(3) ty(y) ty(5)=y2 t y-3 t y2 t y5= y4 t y2 did I do this problem correctly? The reciprocal of a number is added to three. the result is the quotient of 25 and the number. Find the number