Question

solve the pair of linear equation by substitution method X + Y =0and 2 X + Y =1​

Answer 1

Answer:

$\bold\red{X=1\:and\:Y=-1}$

Step-by-step explanation:

Given,

x + y = 0 ............(i)

and

2x + y = 1 .............(ii)

From eqn (i),

we get,

=> x = - y

Now,

substituting this value in eqn (ii),

we get,

=> 2 (-y ) + y = 1

=> -2 y + y = 1

=> -y = 1

=> y = -1

Therefore,

x = - (-1) = 1

Hence,

x = 1

x = 1y = -1