document.write( "Question 936399: 5 years ago Christian was twice as old as Alec. The sum of their ages in 6 years will be 40 years. What is the present age of each?
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document.write( "Note:Please use RESAC (Representation Equation Solution Answer Checking)
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Algebra.Com's Answer #569854 by srinivas.g(540)![]() ![]() You can put this solution on YOUR website! let x, y be the current ages of Christian, Alec \n" ); document.write( "5 years ago Christian was twice as old as Alec. \n" ); document.write( " x-5 = 2*(y-5) \n" ); document.write( " x-5 =2*y+2*(-5) \n" ); document.write( " x-5 =2y-10 \n" ); document.write( " move 2y to the left \n" ); document.write( " x-2y-5 = -10 \n" ); document.write( " move -5 to the right \n" ); document.write( " x-2y =-10+5 \n" ); document.write( " x-2y =-5 ................eq(1) \n" ); document.write( " The sum of their ages in 6 years will be 40 years \n" ); document.write( " (x+6)+(y+6)=40 \n" ); document.write( " x+y+12 =40 \n" ); document.write( " x+y= 40-12 \n" ); document.write( " x+y= 28 -----------eq(2)
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