Question

if a number is doubled and the result is increased by 5, we get 45 find




the number​

Answer 1

Step-by-step explanation:

Let the present age of father's be x years and present age of son's be y years.

According to the problem

x=6y

After 4 years

x+4=4(y+4)

Hence we get two equations

x=6y .(1)

x+4=4(y+4) . (2)

Simplifying eq (2)

x+4=4y+16

x−4y=12

Put x=6y in eq (2), we get

6y−4y=12

2y=12

y=6 years

and x=6y=36 years

Present age of son =6 years

and present age of father =36 years

Answer 2

the number =20

I hope it may help you