Question

solve graphically the pair of linear equations: x - y = 1 and 2x + y = 8 . also, find the area of the triangle formed by the lines representing these two equatiojns with the y - axis

Answer 1

Answer:given pairs of lines are

x-y=0. Eq 1

2x-2y=8. Eq 2

Eq 1 × 2 , we get

2x - 2y = 0. Eq 3

subract Eq 1 and Eq 3

2x - 2y = 8

2x - 2y =0

4x. =8

x = 8/ 4

x = 2

substitute x = 2 in Eq 1

x - y = 0

2 - y = 0

- y = - 2

y = 2

therefore ,

x = 2 , y = 2

Step-by-step explanation:

Answer 2

Step-by-step explanation:

1. Eq... X-y =1

X=1+y

Let y be 1

X =2

Let y be - 1

X=0

Let y be 2

X=3

2. Eq.. 2x+y =8

Y =8/2x

Let x=1

Y=4

Let x =2

Y=4

Let x = 0

Y =0