4x+3y=8 (6,-8) is this the solution

Answer 1

If x = 6, 24 + 3y = 8
which means y = -16/3

There are an infinite number of (x,y) points that are solutions, but (6,-8) is not one of them

Answer 2

You just plug it in. Does 4(6)+3(-8)=8?