Question

जाँच करें कि x = 2, y = 1 निम्नलिखित समीकरणों के हल हैं या नहीं ?
0 2r+3y=7
(ii) 2x-3y+7=8
(ii) 3x +4y=9
(iv) 5x-7y=3​

Answer 1

Answer:

Given - x= 2

- y= 1

To find - equation of this roots

solution-

putting value of X and y in eq. 1

2(2)+3(1)=7

4+3=7

7=7

hence, it is the root of this equation

putting value of X and y in eq. 2

4-3+7=8

1+7=8

8=8

hence, it is the root of this equation

putting value of X and y in eq. 3

3(2)+4(1)=9

6+4=9

10 is not equal to 9

hence, it is not the root of this equation

putting value of X and y in eq. 4

5(2)-7(1)=3

10-7=3

3=3

hence, it is the root of this equation

Answer 2

Step-by-step explanation:

a) 2×(2)+3×(1)=7

4+3=7

7=7

Yes , it is the equal.

b) 2×(2)-3×(1)+7=8

4-3+7=8

1+7=8

8=8

Yes, it is equal.

c) 3×(2)+4×(1)=9

6+4=9

10 # 9

No , it is not equal.

d) 5×(2)–7×(1)=3

10-7=3

3=3

Yes , it is equal.

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