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2x-2y=-3
2x+y=5
2x=5-y
x= 5-y/2
2x-2y=-3
2(5-y/2)-2y=-3
(se simplifican los 2)
5-y-2y=-3
5-3y=-3
-3y=-8
y=-8/-3
y=8/3
el resto lo haces tu, es fácil