Question

Y = 2х - 4
6х-Зу = 12

Answer 1

If you are asking for Linear equations with two unknowns
Answer: infinite solutions
Explanation with steps:

Y=2x-4
6x-3y=12

You want to line them up with x’s and y’s in the same row

1)
y=2x-4
-2x on both sides
now they are lined up
y-2x=4
-3y+6x=12
solve for variable Y using first equation (y-2x=4)
plug Y in from equation 2 (3y+6x=12)
-3(2x-4) + 6x =12
0=0 infinite solutions

Answer 2

y = 2,x -
`(2)/(5)`

Explanation:

Substitute y = 2

{ x - 46x - 3 x 2 = 12}

Simplify

{ - 45x - 6 = 12 }

Isolate x for - 45x - 6 = 12: x = - 2/5

The solutions to the system of equations are:

y = 2, x -
`(2)/(5)`