Joan is 'y' years old. Her father is 4 times as old as she is and 28 years older than her brother. A-Find in terms of y, the age of Joan's brother. B- If 'y' =12, how old is her brother?
father = 4y = brother+28
brother = father-28, so 4y-28posted by Steve
B=F-28 = 4y-28
If y=12 => B=4*12-28 =48-28=20
The brother is 20.posted by Vic