Question

if x+y=3and x-y=-1 then the value of x is​

Answer 1

The value of x is 1.

Step-by-step explanation:

We are given with the two expressions; $x+y=3$ and $x-y=-1$.

And we have to find the value of x.

Firstly, we will take out the value of y from the first equation and then put that value in the second equation and calculate for x, i.e;

Equation 1:  $x+y=3$

                     $y = 3-x$  ------------- [1]

Equation 2:   $x-y=-1$

                      $x-(3-x)=-1$     {using (1)}

                      $x-3+x=-1$

                      $2x-3=-1$

                      $2x=-1+3$

                          $2x=2$

                            $x=\frac{2}{2}=1$

Hence, the value of x is 1.