Respuesta :
Daughter age = x
father= 3x
3x+15+x+15=86
4x+30=86
4x+30=86
-30=-30
========
4x =56....divide both sides by 4
x=14, daughter's age
3x=3(14)=42, father's age
father= 3x
3x+15+x+15=86
4x+30=86
4x+30=86
-30=-30
========
4x =56....divide both sides by 4
x=14, daughter's age
3x=3(14)=42, father's age
Answer:
A)53.25
B)35.5
Step-by-step explanation:
86-15=71
add his times and hers
3+1=4
71/4=17.75
17.75*3=53.25
53.25-17.75=35.5