2x - y = 8 x + y = 1 These are your two equations. They will have two solutions since you have two variables. The solutions are x=3 and y=-2
X = 8That equation has exactly one solution.The solution is:x = 8
If: x-3 = 8 then x = 11 which has only one solution
Infinitely many: they are the same line!
Infinite, both equations are equivalent and all possible solutions can be represented on the graph y = 4 - x
Only one: (3,-2)
It has two solutions and they are: x = 3.230396696 and x = -2.063730029
There are two solutions for x: x=11 and x=-7