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Answer:
x=-2
Step-by-step explanation:
Any x= a number equations are parallel to y axis.
Step-by-step explanation:
This is because y = 2 is horixontal along with x=y. x + y = 0 is diagnol. So basically, the only vertical line is the one of x = -2. x = -2 means that the entire line of x = -2 is going to be parallel to the y-axis.