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.?
---
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.