Question

TELL WHO HAS BRAIN FAST​

Answer 1

Answer:

the answers are in the above attachment.

Answer 2

I don't have brain, but I can help you.

Let assume the boxes have a, b, c & d.

So

1. a + b = 8

2. a + c = 13

3. c - d = 6

4. b + d = 8

by adding all equation

2a + 2b + 2c = 35

taking 2 common

a + b + c = 35/2

by 1, putting value of a + b

8 + c = 35/2

c = 35/2 - 8

c = 19/2

by 2

a + c = 13

a = 13 - c

a = 13 - 19/2

a = 7/2

by 1

a + b = 8

b = 8 - a

b = 8 - 7/2

b = 9/2

by 4

b + d = 8

d = 8 - b

d = 8 - 9/2

d = 7/2

answer

7/2, 9/2, 19/2 & 7/2