SOLUTION: Matthew is 3 times as old as jenny. In 7 years, he will be twice as old as she will be then. How old is each now?
Algebra.Com
Question 219634: Matthew is 3 times as old as jenny. In 7 years, he will be twice as old as she will be then. How old is each now?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
M=3x
J=x
In 7 years:
(3x+7)=2(x+7)
3x=7=2x+14
3x-2x=14-7
x=7 Jenny's age now.
3*7=21 Matthew's age now.
Proof:
3*7+7=2(7+7)
21+7=2*14
28=28
RELATED QUESTIONS
matthew is 3 times as old as jenny. In 7 years he will be twice as old as she will be... (answered by solver91311)
Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be... (answered by ankor@dixie-net.com)
Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be... (answered by vleith)
Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be... (answered by stanbon,robertb)
Matthew is 3 times as old as jenny. In 7 years, he will be twice as old as he will be... (answered by awang1996)
Jenny is three times as old as Sarah. In 12 years Jenny will be twice as old as Sarah is... (answered by flame8855)
Matthew is 3 times as old as Jenny. In 7 years he will be twice as old as she will be... (answered by scott8148,ankor@dixie-net.com,oberobic)
Randal is 3 times as old as Jenny. In 15 years he will be twice as old. How old is he... (answered by JulietG)