question say that this answer is false what is the answer

The PW-based relation for the incremental cash flow series to find Ai* between the lower first-cost alternative X and alternative Y has been developed. 0 = -42,000 + 9000(P/A,Ai * , 10) + (-3000(P/F,Ai* ,10)) * Determine the highest MARR value for which Y is preferred over X. Any MARR value less than 17.187649 % favors Y