SOLUTION: mary who is 16 years old,is four times as old as her brother.how old will mary be when she is twice as old as her brother.?
Algebra ->
Test
-> SOLUTION: mary who is 16 years old,is four times as old as her brother.how old will mary be when she is twice as old as her brother.?
Log On
Question 454670: mary who is 16 years old,is four times as old as her brother.how old will mary be when she is twice as old as her brother.? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! mary who is 16 years old,is four times as old as her brother.how old will mary be when she is twice as old as her brother.?
---
m = 16 yrs
b = 4 yrs
----
Equation:
Solve: 16+x = 2(4+x)
16+x = 8+2x
x = 8
---
Mary will be 16+8 = 24 yrs.
Brother will be 4+8 = 12 yrs.
============================
Cheers,
Stan H.
(