Question 7246: Erin's age is 3 times Warren's. In 4 years she will be twice as old as he will be. how old is each now? Answer by ichudov(507) (Show Source): You can put this solution on YOUR website! Translation from English into algebrese:
Erin = 3*Warren
Erin+4 = 2*(Warren+4)
Erin-3*Warren = 0
Erin - 2*Warren = 4
Solve: We'll use substitution. After moving -3*Warren to the right, we get: , or . Substitute that
into another equation: and simplify: So, we know that Warren=4. Since , Erin=12.