document.write( "Question 551130: A certain two digit number has a value that is eight less than five times the sum of it's digits. The tens digit is 3 less than the units digit. Find the number. Please help me solve this! \n" ); document.write( "
Algebra.Com's Answer #359479 by mathstutor458(57)![]() ![]() ![]() You can put this solution on YOUR website! let the number = xy \n" ); document.write( " two digit number has a value that is eight less than five times the sum of it's digits. \n" ); document.write( "xy=5(x+y)-8 \n" ); document.write( "The tens digit is 3 less than the units digit. \n" ); document.write( "x=y-3\r \n" ); document.write( "\n" ); document.write( "take y=4,so x=4-3=1 (if y=3,x=0 so we will not take this combination) \n" ); document.write( "xy=14 \n" ); document.write( "check xy=5(x+y)-8 \n" ); document.write( "=>14=5(1+4)-8 \n" ); document.write( "=>14=25-8 \n" ); document.write( "=>14=17 does not satisfies the equation\r \n" ); document.write( "\n" ); document.write( "take y=5,so x=5-3=2 \n" ); document.write( "xy=25 \n" ); document.write( "check xy=5(x+y)-8 \n" ); document.write( "=>25=5(2+5)-8 \n" ); document.write( "=>25=35-8 \n" ); document.write( "=>25=27 does not satisfies the equation\r \n" ); document.write( "\n" ); document.write( "take y=6,so x=6-3=6 \n" ); document.write( "xy=36 \n" ); document.write( "check xy=5(x+y)-8 \n" ); document.write( "=>36=5(3+6)-8 \n" ); document.write( "=>36=45-8 \n" ); document.write( "=>36=37 does not satisfies the equation\r \n" ); document.write( "\n" ); document.write( "take y=7,so x=7-3=4 \n" ); document.write( "xy=47 \n" ); document.write( "check xy=5(x+y)-8 \n" ); document.write( "=>47=5(4+7)-8 \n" ); document.write( "=>47=55-8 \n" ); document.write( "=>47=47 satisfies the equation\r \n" ); document.write( "\n" ); document.write( "so the original number is 47. \n" ); document.write( " |