document.write( "Question 1132425: IN 1987, joy was 3 times as old as ali .if ali was born 8 year after joy what age will each be in 1999? \n" ); document.write( "

Algebra.Com's Answer #749453 by ikleyn(52798) $\"\"$ $\"About$

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document.write( "In 1987, Joy was 3 times as old as Ali and 8 ears older than Ali.\r\n" );
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document.write( "From it, you may conclude that in 1987 Ali was 4 years old, while Joy was 12 years old.\r\n" );
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document.write( "Hence, in 1999, Ali was  4 + (1999-1987) = 4 + 12 = 16 years old,    ANSWER\r\n" );
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document.write( "          while Joy was 12 + (1999-1987) = 12 + 12 = 24 years old.   ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "It is mental solution, without using equation.\r
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\n" ); document.write( "\n" ); document.write( "If you want an algebraic solution, here it is.\r
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document.write( "Let A be the age of Ali in 1987.\r\n" );
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document.write( "Then Joy's age at that time was  3A, according to the condition.\r\n" );
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document.write( "Also, we know that\r\n" );
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document.write( "3A - A = 8.      (\"Ali was born 8 year after Joy\")\r\n" );
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document.write( "So,\r\n" );
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document.write( "2A = 8  ====>  A = 8/2 = 4 years (Ali's age in 1987).\r\n" );
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document.write( "From this point, you can complete the solution by the same way as I did it before.\r\n" );
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document.write( "You will get the same answer :  Ali was 16 years old in 1999;  Joy was 24 years old at that time.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved (two times with two methods).\r
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