Respuesta :
Answer:
S = 5y + 4
Step-by-step explanation:
f is Sara's father, y is Sara, b is Sara's brother and S is sum
3y = f
b = y + 4
S = f + y + b
= 3y + y + y + 4
= 5y + 4
Hope this helps!
Answer:
[tex]5y+4[/tex]
Step-by-step explanation:
What we know:
- 3 × [tex]y[/tex] is equal to Sara's father's age
- [tex]y[/tex] + 4 is equal to Sara's brother's age
- [tex]y[/tex] is equal to Sara's age
Sum of their ages = father's age + Sara's age + brother's age
Sum of their ages = [tex]3y+y+(y+4)[/tex]
Sum of their ages = [tex]5y+4[/tex]
I hope this helps!