Question

If the two lines 2x + y= 0 and y=3 are plotted on a typical xy coordinate grid, at which point will they intersect?

Can someone point me in the direction of a vidoe to show how this is done

Answer 1

2x + y = 0
2x + 3 = 0
- 3 - 3
2x = -3
2 2
x = -1¹/₂
(x, y) = (-1¹/₂, 3)

Answer 2

we have
equation 1
`2x+y=0`

equation 2
`y=3`

substitute the equation 2 in equation 1

`2x+[3]=0 \\ 2x=-3 \\ x=- (3)/(2)`

the solution is the point

`(- (3)/(2) ,3)`

using a graph tool
see the attached figure