Question

please try this logical question and answer me please

Answer 1

3.5 + 4.5 = 8
+ +
9.5 + 3.5 = 6
= =
13 8

Answer 2

Answer:

Answer would be 3.5, 4.5, 9.5 and 3.5

Step-by-step explanation:

There are 4 unknown numbers and 4 equations. Let the unknown numbers a, b, c, and d. So the equations become:

a + b = 8 ---------- (1)

b + d = 8 --------- (2)

a + c = 13 --------- (3)

c - d = 6  ---------- (4)

Comparing (1) and (2), we notice that

a = d

And comparing (1) and (3), we also notice that

c = b + 5

Substitute (4) a with d and c with b + 5. We get

b + 5 - a = 6    [subtract 5 from both side]

b - a = 1

-a + b = 1 .................. (5)

Recall

a + b = 8 .................. (1)

Now we see that (5) has the same variables as (1) so eliminate one variable. If you add both equations, you'd eliminate a, but if you subtract, b goes. Let's add.

-a + a + b + b = 1 + 8

0 + 2b = 9

b = 4.5

but a + b = 8

Therefore

a = 8 - b = 8 - 4.5 = 3.5

d = a = 3.5

Then

c - d = 6

c - 3.5 = 6

c = 6 + 3.5 = 9.5

So the equations are like this :

3.5 + 4.5 = 8

 +       +

9.5 - 3.5 = 6

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13        8