document.write( "Question 147224: Julia's age is 4 less than 5 times Jack's age. If 3 times Jack's age is added to Julia's age, the sum is equal to twice Julia's age. Find their ages. \r
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document.write( "I came up the the equation of 5x-4+3x. It doesn't work. Help! \n" );
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Algebra.Com's Answer #107593 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! Julia's age is 4 less than 5 times Jack's age. If 3 times Jack's age is added to Julia's age, the sum is equal to twice Julia's age. Find their ages. \n" ); document.write( ". \n" ); document.write( "Assign variables to things you don't know. \n" ); document.write( "Let x = jack's age \n" ); document.write( "5x-4 = julia's age \n" ); document.write( ". \n" ); document.write( "then from: \n" ); document.write( "\"If 3 times Jack's age is added to Julia's age, the sum is equal to twice Julia's age.\" we get our equation: \n" ); document.write( "(5x-4)+3x = 2(5x-4) \n" ); document.write( "5x-4+3x = 10x-8 \n" ); document.write( "8x-4 = 10x-8 \n" ); document.write( "4 = 2x \n" ); document.write( "2 = x (Jack's age) \n" ); document.write( "5x-4 = 5(2)-4 = 10-4 = 6 (Julia's age) \n" ); document.write( " \n" ); document.write( " |