document.write( "Question 1064206: Using only one variable, The sum of Robin and Bruno's age is 45. Seven years ago, Robin was 16 years more than one-half as old as Bruno was then. How old is Bruno? \n" ); document.write( "
Algebra.Com's Answer #679258 by addingup(3677)![]() ![]() You can put this solution on YOUR website! R+B = 45, so R = 45-B \n" ); document.write( "------------------------------ \n" ); document.write( "R-7 = 16+1/2(B-7) now substitute for R \n" ); document.write( "(45-B)-7 = 16+1/2B-3.5 \n" ); document.write( "45-B = 23+1/2B-3/2 \n" ); document.write( "45-B = 19.5+1/2B \n" ); document.write( "25.5 = 1.5B \n" ); document.write( "B = 25.5/1.5 = 17 Bruno is 17 \n" ); document.write( "And Robin is 45-17 = 28\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |