exam Maths Puzzle Numerical Ability

Y varies directly as the cube of x. If y=1,000 when x=2, find y when x is 3.

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exam Other Question

solve each equation:

(2x-5)(6x+1) =(3x+2)(4x-7)

this looks so easy but i cant get it=) Can someone Solve the equation using the zero factor property? Thanks!

25y^2+4=20y