document.write( "Question 656154: in 30 years, Dino will be 8 times as he was 12 years ago. How old is he now? \n" ); document.write( "
Algebra.Com's Answer #409361 by chandrak(4)![]() ![]() ![]() You can put this solution on YOUR website! Assume Dinos age now is y\r \n" ); document.write( "\n" ); document.write( "12 years ago Dinos age y-12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "8 times of that 8*(y-12)\r \n" ); document.write( "\n" ); document.write( "in 30 years Dinos age y + 30 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The equation will be \n" ); document.write( "y + 30 = 8*(y-12) \r \n" ); document.write( "\n" ); document.write( "y + 30 = 8y -96\r \n" ); document.write( "\n" ); document.write( "y - 8y = -126 \r \n" ); document.write( "\n" ); document.write( "-7y = -126 \r \n" ); document.write( "\n" ); document.write( "y = -126/-7 = 18 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since y is the Dinos age now \r \n" ); document.write( "\n" ); document.write( "Dino is 18 years old\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |