# SOLUTION: How do I solve using a system of two equations in two variables? Jack is twice as old as Jill. In two years, Jack will be 4 times as old as Jill was 9 years ago. How old are the

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: How do I solve using a system of two equations in two variables? Jack is twice as old as Jill. In two years, Jack will be 4 times as old as Jill was 9 years ago. How old are the      Log On

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 Click here to see ALL problems on Linear-systems Question 141294This question is from textbook algerbra 1 : How do I solve using a system of two equations in two variables? Jack is twice as old as Jill. In two years, Jack will be 4 times as old as Jill was 9 years ago. How old are they now?This question is from textbook algerbra 1 Answer by scott8148(6628)   (Show Source): You can put this solution on YOUR website!let x=Jack and y=Jill "Jack is twice as old as Jill" __ x=2y "In two years, Jack will be 4 times as old as Jill was 9 years ago" __ x+2=4(y-9) substituting __ (2y)+2=4(y-9) __ 2y+2=4y-36 __ 38=2y __ 19=y substituting __ x=2(19) __ x=38