document.write( "Question 479955: Michael is thinking of two 2-digits numbers X and Y. X and Y shares the same two digits and the ratio of X to Y is 4/7. She halves the value of X and reduced the value of Y to 1/3 its original value. Next, she subtracts 3 from Y. Both X and Y has the same value now. What was the original numbers X and Y? \n" ); document.write( "
Algebra.Com's Answer #328829 by mananth(16946) You can put this solution on YOUR website! Michael is thinking of two 2-digits numbers X and Y. X and Y shares the same two digits and the ratio of X to Y is 4/7. She halves the value of X and reduced the value of Y to 1/3 its original value. Next, she subtracts 3 from Y. Both X and Y has the same value now. What was the original numbers X and Y? \n" ); document.write( "be \n" ); document.write( "Let X be 10t+u \n" ); document.write( "Y= 10u+t\r \n" ); document.write( "\n" ); document.write( "(10t+u)/(10u+t)=4/7\r \n" ); document.write( "\n" ); document.write( "7(10t+u)=4(10u+t) \n" ); document.write( "70t+7u=40u+4t \n" ); document.write( "66t-33u=0 \n" ); document.write( "2t-u=0..............1\r \n" ); document.write( "\n" ); document.write( "1/2(10t+u) = ((10u+t)-3)/3 \n" ); document.write( "3(10t+u)=2((10u+t)-3) \n" ); document.write( "30t+3u=20u+2t-6 \n" ); document.write( "32t-17u=-6...................2\r \n" ); document.write( "\n" ); document.write( "but u =2t \n" ); document.write( "substitute u in (2) \n" ); document.write( "32t-17*2t=-6 \n" ); document.write( "32t-34t=-6 \n" ); document.write( "-2t=-6 \n" ); document.write( "/-2 \n" ); document.write( "t=3 \n" ); document.write( "Therefore u=6\r \n" ); document.write( "\n" ); document.write( "The numbers are 36 & 63 \n" ); document.write( "CHECK\r \n" ); document.write( "\n" ); document.write( "36/63 = 4/7\r \n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |