8
x=4 y=4
y=8 y = 2x y = 2(4) <-- substitute 4 for x y = 8 <-- this is your answer
If x=4... then 'y' MUST equal 3 !
So -3x - 6 = x - 4, ie -2 = 4x so x = -½ and y = -4½
8
x=4 y=4
If X+Y=5;X=4, then x=4 and y=1
x=4 y=x+3 y=4+3 y=7
10
If: 3x+y = 4 and x+y = 0 Then: x = 2 and y = -2
Evaluate x/y when x = 4 and y = 4. x/y = 4/4 = 1/1 = 1
y=-x+4
y=x+4
y=x+4
y equals x plus 4 when y equals 0 then x equals 2i i is the square root of negative 1
4