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2x-3Y = 19 | 2 |
______________-
7y = -28
y = -4
x = 3,5
dikali 1
⇒ 12x+3y = 30
2x-3y = 19 +
14x = 49
x = 3,5
⇒ 4x+y = 10
4.3,5+y = 10
14 + y = 10
y = -4