Answer:
Sue = 25.75
Dave = 29.5
Tom = 19.75
Sue = s
Tom = t
Dave = d
Step-by-step explanation:
s+t+d = 75
s-6=t
d +16 = s+t
d+16+d= 75
2d = 59
d = 29.5
t = s-6
t+s = 45.5
s-6+s= 45.5
2s = 51.5
s= 25.75
t= 19.75
tom - 12
sue - 18
Dave - 45
tom - x
sue - y
Dave - z
because sue is six years older than tom, she is (x+6)
because Dave is 15 yes older than both tom and sue , he is 2x + 6
