Question

2x - 3y = 9 ; 2x + y = 13​

Answer 1

Answer:

solution=(x,y)=(7,-1)

Step-by-step explanation:

2x-3y =9-------(1)

2x+y=13--------(2)

substracting equation (2) from (1)

[2x+y=13]-[2x-3y=9]

=-4y=4

y=-1

substitute y=,-1 in equation 2

2x+y =13

2x+(-1)=13

2x-1=13

2x=13+1

2x=14

x=7

Answer 2

Answer:

(x,y)=(6,1)

Step-by-step explanation:

2x -3y = 9 ------(1)

2x + y = 13------(2)

Substracting equation (1) from (2)

[2x +y=13]-[2x-3y=9]

=4y =4

=y =1

Put y =1 in equation (1)

2x-3y =9

2x-3×1 =9

2x-3=9

2x=12

x=6