Question

Solve by
groaphical method
x+y= 7and x-y = -1​

Answer 1

Answer:

4,3

Step-by-step explanation:

x=7-y (1)

x=y-1 (2)

therefore (1) = (2)

7-y = y-1

y+y = 7+1

2y=8

y=4

therefore,

x=4-1

x=3

Answer 2

Answer:

a) a)

x = 7 - y x = -1 + y

put y = 1 Put y = 1

x = 6 x = 0

(x,y) = (6,1) ( x,y) = (0,1)

b) put y = 0 b) put y = -1, x = -1 + y

x = 7 -y x = -2

x = 7 (x,y)= (-2,-1)

(x,y) = (7,0)

c) put y = 2 c) put y = 3

x = 7 - y x = -1 + y

x = 5 x = 2

(x,y) = (5,2) (x,y) = (2,3)

Plotting in Graph

For Graph:- Attachment Check

Answer:- x = 4, y= 3 is the solution