document.write( "Question 246071: In a building with floors 1 through 7, on which floor would you be if the walk to the seventh floor is twice as long as the walk to the first floor? \n" ); document.write( "
Algebra.Com's Answer #179741 by richwmiller(17219) You can put this solution on YOUR website! let x = current floor \n" ); document.write( "7-x is the distance from the current floor to floor 7 \n" ); document.write( "x-1 is the distance from the current floor to the first floor \n" ); document.write( "7-x=2y \n" ); document.write( "substitute \n" ); document.write( "7-x=2(x-1) \n" ); document.write( "7-x=2x-2 \n" ); document.write( "add 2 to both sides \n" ); document.write( "9-x=2x \n" ); document.write( "add x to both sides \n" ); document.write( "9=3x \n" ); document.write( "divide by 3 \n" ); document.write( "3=x \n" ); document.write( "You are on the third floor. \n" ); document.write( "check\r \n" ); document.write( "\n" ); document.write( "3-1=2 \n" ); document.write( "7-3=4 \n" ); document.write( "4 is twice 2 \n" ); document.write( "ok \n" ); document.write( " \n" ); document.write( " |