Answer:
Addition Property of Equality
Step-by-step explanation:
So we had:

And then we got:

We did this by adding 2 to both sides of the equation. When we added 2, the left side cancelled and the right side equated to 9:

Since we added 2 to both sides, this is an example of the addition property of equality.
It is no solution, bc the answer is (0,0)
Answer:
y=-3x+1
Step-by-step explanation:
plug in point into x and y, replace -4 as a +b(or any other variable to represent y intercept)
therefore,
7=-3(-2)+b
7=6+b
1=b
y=-3x+1
U can use elimination and multiply all the terms in the top expression to get 3x-3y = -4, or 4x = -4, so x = -1. plug it in to find y if needed