exam Maths Puzzle Numerical Ability

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4/5x +9 = -2

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exam Other Question

3x+2y=51

13=20x-5y

3y=-4x+2 If 20 percent of x equals 80 percent of y, which of the following expresses y in terms of x?

(A) y=16% of x
(B) y=25% of x
(C) y=60% of x
(D) y=100% of x
(E) y=400% of x