Question

x+y=7;x-y=-1.graphical.method​

Answer 1

Step-by-step explanation:

EXPLANATION.

Graph of the equation.

⇒ x + y = 7. - - - - - (1).

⇒ x - y = -1. - - - - - (2).

As we know that,

From equation (1), we get.

⇒ x + y = 7. - - - - - (1).

Put the value of x = 0 in equation, we get.

⇒ (0) + y = 7.

⇒ y = 7.

Their Co-ordinates = (0,7).

Put the value of y = 0 in equation, we get.

⇒ x + (0) = 7.

⇒ x = 7.

Their Co-ordinates = (7,0).

From equation (2), we get.

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

Put the value of x = 0 in equation, we get.

⇒ (0) - y = -1.

⇒ - y = -1.

⇒ y = 1.

Their Co-ordinates = (0,1).

Put the value of y = 0 in equation, we get.

⇒ x - (0) = -1.

⇒ x = -1.

Their Co-ordinates = (-1,0).

Both curves intersect at a point = (3,4).

Answer 2

$\huge\purple{\mid{\fbox{\tt{Answer✿࿐}}\mid}}$

First of all

Take any no.and make find its set

Like

Let X= 3

Y= 7-X=4

Make 2–3 sets of no. like this

Then do same for the next equation that is X-Y=-1