Answer:
29years
Step-by-step explanation:
let phil age now = x
15 years ago, phil age = x-15
let darell age now = y
15 years ago darell age = y-15
15 years ago,
phil's age = twice darell's age
x-15 = 2(y-15)
x-15 =2y-30
x-2y = -30+15
x-2y = -15 ..................equation (1)
four years ago, Phil's age = x-4
three years from now, darell's age = y+3
x-4=y+3
x-y =3+4
x-y =7
x=7+y............equation(2)
subtituting the value of x in equation (2) to equation (1)
x-2y = -15
7+y -2y = -15
7-y=-15
y=7+15=22
subtituting the value of y into equation (2)
x=7+y
=7+22=29
therefore, Phil age now is 29years
