document.write( "Question 514748: A mechanic earns $20 an hour, but 25% of his earnings are deducted for taxes and various types of insurance. What is the least number of hours the mechanic must work in prder to have no less than $450 in after tax-income?\r
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document.write( "answer is 30 h.\r
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document.write( "how do i get that answer? \n" );
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Algebra.Com's Answer #343552 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let the number of hours he works to get $450 be x\r \n" ); document.write( "\n" ); document.write( "$20/h \n" ); document.write( "so he will get 20x\r \n" ); document.write( "\n" ); document.write( "25% deducted\r \n" ); document.write( "\n" ); document.write( "0.25of 20x deducted \n" ); document.write( "=5x\r \n" ); document.write( "\n" ); document.write( "20x-5x=450\r \n" ); document.write( "\n" ); document.write( "15x>= 450 \n" ); document.write( "/15 \n" ); document.write( "x>= 450/15 \n" ); document.write( "x>=30 \n" ); document.write( "He should work 30 hours or more \n" ); document.write( "m.ananth@hotmail.ca\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |