Answer:
A
Step-by-step explanation:
To solve using the substitution method let's try to isolate the y variable in the first given equation: 2x + y = 6
Subtract 2x from both sides
2x + y = 6
- 2x - 2x
y = 6 - 2x
Now plug the new y into the second equation: 3y - 18 = -6x
3(6 - 2x) - 18 = -6x
18 - 6x - 18 = -6x
-6x = -6x
Since we get that both sides of the equation are exactly the same, that means the solution can be all real numbers.
