Question

which of the following pair is solution of the equation 3x - 2y = 7 ?
1. 1,-2
2. -2,1
3. 5,1
4. 1,5​

Answer 1

Step-by-step explanation:

which of the following pair is solution of the equation 3x - 2y = 7 ?

1. 1,-2

2. -2,1

3. 5,1

4. 1,5

Answer 2

Given: 3x - 2y= 7

To find : Pair of Solution

Find:

We can try hit and trial method with the given options

(i) ( 1,-2)

3x-2y=7

Taking LHS

= 3(1)- 2(-2)

= 3 - (-4)

= 3 + 4

= 7

(ii) ( -2 , 1)

3x-2y=7

Taking LHS

= 3(-2)- 2(1)

= -6 -2

= -8

(ii) (5,1)

3x-2y=7

Taking LHS

= 3(5) - 2(1)

= 15-2

= 13

(iv) (1,5)

3x-2y=7

Taking LHS

= 3(1)- 2(5)

= 3-10

= -7

As we can see the first option satisfies the situation.

As we can see the first option satisfies the situation.option A where (1,-2) are the pairs for 3x-2y=7.