Question

3x+4y=11;
4x+3y=21
x−y= ?
​​

Answer 1

Answer:

hii

Step-by-step explanation:

Solution

(1) <br>

(2) <br> Step 1: Adding both the equations, we get <br>

<br>

<br>

(3) <br> Step 2: Subtracting the equation (2) from the equation (1) <br>

<br>

(4) <br> Step 3: Adding the equations (3) and (4), we get <br>

<br>

<br>

(from (3)) <br>

<br> Substituting

in any of the equations (1), (2), (3) or (4), we get

. <br> The solution of the pair of equations is

x = 2, y = 1

x - y = ?

2 - 1 = 1.

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