Question

1 Solve the following system of equations graphically:
4x - y = 5, 5y - 4x = 7.
Graph is necessary
​

Answer 1

Answer:

Explanation :

4x - y = 5 ---- (1)

-4x + 5y =7 ---- (2)

Adding equations 1 & 2 we get : 4y = 12

So y = 12/4 = 3

Substituting y = 3 in equation 1 , we get 4x - 3 = 5

4x = 8

x = 4/8 = 2

Hence solved . x = 2 & y = 3

If you draw a graph for the equations , you will get two straight lines . The co-ordinates of the point of intersection of the two lines will be the solution. THE CO-ORDINATES WILL BE (2,3)