Question

x+y=7: 2x +y =9
find the answers ​

Answer 1

Answer:

Given equations are

x+y=7 ....(1)

and 2x−3y=9 ....(2)

Multiply equation (1) by 3, we get

3x+3y=21 .... (3)

Add equations (2) and (3) to eliminate y,

5x=30

⇒x=6

Substitute this value in equation (1), we get

6+y=7

⇒y=1

Therefore, the solution is x=6,y=1.

Answer 2

Answer:

Given equations are

x+y=7 ....(1)

and 2x−3y=9 ....(2)

Multiply equation (1) by 3, we get

3x+3y=21 .... (3)

Add equations (2) and (3) to eliminate y,

5x=30

⇒x=6

Substitute this value in equation (1), we get

6+y=7

⇒y=1

Therefore, the solution is x=6,y=1.