Question

solve the following simultaneous equation by graphical method first X + Y is equal to 7 and x minus Y is equal to 5​

Answer 1

Answer:

x=6 , y = 1

Step-by-step explanation:

A/q

x + y = 7 , x - y = 5

x =7 - y (i) , x = 5 + y (ii)

From equation i and ii ,

7 - y = 5 + y

-y - y = 5 - 7

- 2y = - 2

y = 1

Using the value of y ,

( i ) x = 7 - y

x = 7 - 1

x = 6