document.write( "Question 959814: The sum of the age of a girl and her brother is 26 years.three years age,her age was four times the age of her brother fine their present age..? Plzzzzz help i am having exam \n" ); document.write( "
Algebra.Com's Answer #586630 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! let x be the girls age and y be her brothers age, then \n" ); document.write( "x + y = 26 \n" ); document.write( "(x-3) = 4(y-3) \n" ); document.write( "solve fist equation for x and substitute in second equation \n" ); document.write( "(26-y-3) = 4y -12 \n" ); document.write( "23-y = 4y -12 \n" ); document.write( "add y to both sides of =, then add 12 to both sides of = \n" ); document.write( "5y = 35 \n" ); document.write( "y = 7 and x = 19 \n" ); document.write( "The girl is 19 and her brother is 7 \n" ); document.write( " \n" ); document.write( " |