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y=-2
itu jawabannya…
x+ y = 1 | × 2
----------------
2x+3y = 0
2x+2y = 2
----------- -
y = -2
2x+3y = 0
2x+3(-2) = 0
2x+ (-6) = 0
2x = 6
x = 3
Jadi, x = 3 dan y = -2