document.write( "Question 940696: Jack is 58 years younger than Jill. Seven years from now the the sum of their ages will be 92.
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document.write( "How old is Jill now? \n" );
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Algebra.Com's Answer #573308 by macston(5194)![]() ![]() You can put this solution on YOUR website! Jack=Jill-58 years \n" ); document.write( "If the sum their ages totals 92 in seven years the sum is presently: \n" ); document.write( "92-14 (7 years for each)=78 years \n" ); document.write( "So Jill + Jack=78 years \n" ); document.write( "Substitute for Jack, solve for Jill: \n" ); document.write( " Jill + Jill -58 years=78 years \n" ); document.write( " Jill+Jill=136 years Add 58 years to both sides \n" ); document.write( " 2Jill=136 \n" ); document.write( " Jill=68 Divide both sides by 2 ANSWER Jill's Age \n" ); document.write( "This would make Jack 10 \n" ); document.write( "CHECK: \n" ); document.write( "In 7 years, Jack will be 17 and Jill will be 75 \n" ); document.write( "Jack in 7 + Jill in 7=92 years \n" ); document.write( "17 years + 75 years=92 years \n" ); document.write( " 92 years=92 years \n" ); document.write( " |