book Maths Puzzle Numerical Ability

6x+ 18/x2-9 divided by x+3/x-3 multipled by x+3/6

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book Other Question

Ms. bell has money invested in two enterprises. She has $900 more invested at 8% than she does at 6% a year. She earned $170 of annual interest from teh investments. How much does please help me solve the equation ay over x =cz for each of the following

y
z
x