Question

Help me with this question​

Answer 1

Step-by-step explanation:

1. Let the number be x.

According to question:

4+x=x/2+10

4+x=x+20/2

2(4+x)=x+20

8+2x=x+20

2x-x=20-8

x=12.

2.Let the age of Rohan be x and his sister's be y.

According to question:

x=8+y

x-y=8--(1)

x+3=3(y+3)

x+3=3y+9

x-3y=9-3=6--(2)

By elimination method: (1)-(2)

x. -y. = 8

(-)x(+)-3y=-6

2y=2

y=1.---(3)

(3) in (1):

x-y=8

x=8+1=9.

3.

x-

Answer 2

Answer:

answer attached in photo