Question

A father is 4 times as old as his son. In 20 years, The father will be twice as old as his son.​

Answer 1

Explicație pas cu pas:

20x4=80 years have hes father

Answer 2

Răspuns:

Explicație pas cu pas:

Note :

f= father 's old

s= son 's old

------------------------

f= 4*s

(f+20) =2(s+20)

4s+20 = 2s +40

2s=20

s=10 years old

f= 4*10=40 years old

succes