SOLUTION: Solving problems involving systems of linear equations in two variables: three years ago, rica was thrice as old as dandy. three years hence, she will be twice as old. find thei

Question 1102873: Solving problems involving systems of linear equations in two variables:
three years ago, rica was thrice as old as dandy. three years hence, she will be twice as old. find their present ages.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Three years ago,

1.
.
.
.
Three years from now,

2.
.
.
Subtract eq. 2 from eq. 1,

Now use either equation to solve for R.

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