Question 374630
Okay to do this you will need to set up a simple equation and give out variables.

Girls age = x-6
Brother's age= *

the you will take those 2 and add them and place them equil to 135 like so:

x-6+x=135
2x-6+6=135+6
2x=141
2x/2=141/2
x=70.5

The brothers age would be 70.5 then and the girl's would be 64.5