document.write( "Question 1143420: Darius is 87 years younger than jack. 11 years ago, jacks age was 4 times Darius’s age. How old is Darius now? X= current age of Darius. the equation should contain 87,11, & 4.
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Algebra.Com's Answer #764223 by ikleyn(52803) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Darius is X years old.\r\n" );
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document.write( "Jack is (X+87) years old.\r\n" );
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document.write( "11 years ago, Jack was  (X+87-11) = (X+76) years old.\r\n" );
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document.write( "11 years ago, Darius was (X-11) years old.\r\n" );
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document.write( "The equation is\r\n" );
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document.write( "    X+76 = 4*(X-11).\r\n" );
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document.write( "Solve it to get the answer : Darius is 40 years old now.\r\n" );
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document.write( "(a)  Then Jack's age is  40 + 87 = 127 years now.\r\n" );
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document.write( "(b)  CHECK:  11 years ago  Darius was  40-11 = 29 years old;  Jack was  127 - 11 = 116 years old;    = 4,\r\n" );
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document.write( "             so the condition is satisfied and the solution is correct.\r\n" );
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document.write( "             Is it realistic/likelihood or not - it was not asked in the problem, so I do not touch it . . . \r\n" );
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document.write( "             Formally, my solution is correct.\r\n" );
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