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2x + y = -3
x - 2y = 19 dikali 2 -------> 2x - 4y = 38
2x + y = -3 dikali 1 -------> 2x + y = -3
__________ -
-5y = 41
y = -41/5
x - 2y = 19
x - 2(-41/5) = 19
x + 82/5 = 19
x = 95/5 - 82/5
x = 13/5