Question

Solve
the
following simultaneous equations graphically x+y=3,x-y=1​

Answer 1

Answer:

So first u have to make a few equations , ill be making 2 for each

For x + y = 3

1st equation = ill take x as 0

               so = 0 + y = 3

                    = y = 3

so as y = 3  , x + 3 = 3 (from the equation)

                      x = 3 - 3

                      x = 0

So ur first point is (0,3) , u have to mark (0,3) on ur graph

U can take any other no. ill be taking y as 1

So we'll get  x + 1 = 3

                   x = 3 - 1

               so x = 2

The other point will be (2,1)

So u have to mark (0,3) and (2,1) on ur graph which is simple

Then well  take x - y = 1

So ill take x as 3

We'll get 3 - y = 1

           so - y = 1 - 3

                -y = - 2

                  y = 2 ( as - gets cancelled from both the sides )

So from the equation x - 2 = 1

                                so x = 1 + 2

                                    x  = 3

The point well get is (3 , 2)

Next ill take y as 4 so well get

x-4 = 1

x = 1 +4

x = 5  

From the equation : 5 - y = 1

                          so   - y = 1 - 5

                                 - y = -4

                                   y = 4 (As - gets cancelled)

So the other point u get is (5,4)

Now u have to mark (3,2) and (5,4) on the graph  

x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-

As they have not given the no. of equations u have to form , i formed 2 but its best to form 3

I hope this is the help that u wanted