Question

solve it :-
$3x + y = 0 - - - - (1)$
$x - y = 30 - - - - ( 2)$
solve this two equation by substitution method ​

Answer 1

Hey mate,...

3x+y=0->1

x-y=30->2

Multiple equation two with 3.

Now,3x+y=0

3x-3y=90

-----------------------

2y=-90

y=-45.

Hope it will help you.

✨Sai.

Answer 2

3x+y=0->1

x-y=30->2

Multiple equation two with 3.

Now,3x+y=0

3x-3y=90

-----------------------

2y=-90

y=-45.

Hope it will help you.