document.write( "Question 675054: Matt is one year older than five times Kelly's age. In three years, Matt will be only three times Kelly's age. How old are they now? \n" ); document.write( "
Algebra.Com's Answer #419526 by rm29924(97)![]() ![]() You can put this solution on YOUR website! Let x = Kelly's current age \n" ); document.write( "Matt's current age is 5x+1\r \n" ); document.write( "\n" ); document.write( "Kelly's age in 3 years = x+3 \n" ); document.write( "Matt's age in 3 years = 5x+1+3\r \n" ); document.write( "\n" ); document.write( "Matt's age in 3 years = 3 times Kelly's age in 3 years \n" ); document.write( "5x+1+3 = 3(x+3) \n" ); document.write( "5x+4=3x+9 \n" ); document.write( "subtract 4 from both sides \n" ); document.write( "5x=3x+5 \n" ); document.write( "subtract 3x from both sides \n" ); document.write( "2x=5 \n" ); document.write( "divide both sides by 2 to get x by itself \n" ); document.write( "x=2.5\r \n" ); document.write( "\n" ); document.write( "answer: Kelly is 2.5 years old \n" ); document.write( "Matt is 5(2.5)+1 = 13.5 years old \n" ); document.write( " \n" ); document.write( " |