document.write( "Question 373401: Two identical jars are filled with equal marbles. The marbles are colored red or white. The ratio of red to white marbles is 7:1 in Jar I and 9:1 in Jar II. If there are 90 white marbles all together, how many red marbles are in Jar II? \n" ); document.write( "
Algebra.Com's Answer #265839 by scott8148(6628) You can put this solution on YOUR website! 8 parts in I and 10 parts in II ___ 8x = 10y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "\"there are 90 white marbles all together\" ___ x + y = 90 ___ x = 90 - y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting ___ 8(90 - y) = 10y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "720 = 18y ___ 40 = y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "9 * 40 = 360 \n" ); document.write( " |