Answer:


Explanation:
First, Let's solve for x in -2x+2y=-4:

Subtract 2y from both sides:


Divide both sides by -2:


Now, we'll substitute x=y+2 to 3x+3y=-18:

→ let x=2+y

Simplify:

Now, let's solve for y in 6+6y=-18

Subtract 6 from both sides:


Divide both sides by 6:


Now, substitute y=-4 into x=2+y:

→ let y = -4


Therefore, x=-2 and y=-4.
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