document.write( "Question 720877: In 10 years,A will be twice as old as B was 10 Years ago.If A is now 9 years older than B,the present age of B is? \n" ); document.write( "
Algebra.Com's Answer #442099 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! In 10 years, A will be twice as old as B was 10 Years ago. \n" ); document.write( "a + 10 = 2(b-10) \n" ); document.write( "a + 10 = 2b - 20 \n" ); document.write( "a = 2b - 20 -10 \n" ); document.write( "a = 2b - 30 \n" ); document.write( ": \n" ); document.write( "If A is now 9 years older than B, \n" ); document.write( "a = b + 9 \n" ); document.write( ": \n" ); document.write( "the present age of B is? \n" ); document.write( "replace a with (2b-30) \n" ); document.write( "2b - 30 = b + 9 \n" ); document.write( "2b - b = 9 + 30 \n" ); document.write( "b = 39 yrs old \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check this in the statement: (a: 39+9 = 48) \n" ); document.write( "\"In 10 years, A will be twice as old as B was 10 Years ago.\" \n" ); document.write( "48 + 10 = 2(39-10) \n" ); document.write( "58 = 2(29) \n" ); document.write( " \n" ); document.write( " |