Question

3x -4y =12;x+2y =4 in chapter pair of linear equations in two variables ​

Answer 1

⚔Given⚔:

• Linear equations are given ,

1. 3x-4y=12
2. x+2y= 4.

⚔To Find⚔:

• Values of x and y.

⚔Answer⚔:

First equation is 3x - 4y = 12 and second one is x + 2y = 4 .

Firstly let us number the equⁿ.

• 3x - 4y = 12 .......(i)
• x + 2y = 4 .......(ii)

Multipling (ii) with 2 ,

—» 2 ( x + 2y ) = 2×4 ⚔

—» 2x + 4y = 8 .

Now adding it with (i),

=> 3x-4y+2x+4y = 8+12.

=>5x = 20.

=> x = 20/5 .

=> x = 4 .

Putting this value in (ii),

=> 3×4 - 4y = 12 .

=> 12 - 4y = 12 .

=> -4y = 12-12

=> -4y = 0.

=> y = 0.

Hence

• x = 4
• y = 0.

Answer 2

Answer:

refer to the attachment!

Step-by-step explanation:

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