Question

0.No. 12 ਸਮੀਕਰਣ ਪ੍ਰਣਾਲੀ ਨੂੰ ਹੱਲ ਕਰੋ : Solve theequations: 3x – y = 3, 7x+2y = 20​

Answer 1

Answer:

3x-y=3 let's this first equation

7x+2y=20 and this is second equation

(3x-y =3) × 2

6x-2y=6 third is second equation

equation second+ equation third

(7x+2y=20) + (6x-2y=6)

13x =26

x=2

put x value in first equation

3x-y=3

3x2-y=3

6-y=3

-y=3-6

-y=-3

y=3

there x=3 and y=3