exam Maths Puzzle Numerical Ability

Hello I need some one to help with this solution please. Last year ralph had $5 million in operation income. there was net depreciation of $1 million and interest expense of $1mill

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can you please help me find the inverse of j(x)=(2x+5)/(x-2) Please help with this problem
The complex numbers 2/5xi + 3 and -4 - 1/4yi are equal. Find the values of x and y
Have tried solving as a regular equation but cannot find equal values.