Question

X+2y-1=0 ,3x-y+2=0 elimination

Answer 1

Answer:

x+2y -1 = 0.

x+2y = 1. .......... (1)

3x - y +2= 0

3x -y =-2 .........(2)

Multiplying equation (2) by 2

6x -2y = -4. ............(3)

Adding equation 1 and 3

x + 2y = 1

+ 6x-2 y = -4

7x = -3

x = -3

7. (4)

Substituting x = -3/7 in equation (1)

-3 +2 y = 1

7.

-3 + 2y = 7

2y = 7+3

2y= 10

y = 10

2

y= 5.

solution is( -3 , 5)

7