exam Maths Puzzle Numerical Ability

Solve for x and y.
5x+(y-3)i=x-4+6yi

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exam Other Question

The difference of 2 numbers is 4. The difference between their reciprocals is 4/21. Find the 2 numbers How many pounds of seed worth $0.60 a pound must be mixed with 300 pounds of seed worth$0.35 a pound to produce a mixture worth $0.50 per pound?
______lbs. of $0.60 a pound seed.