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4x + -y = -11 (x1)
sehingga
4x + 6y = 10
4x + -y =-11 -
7y= 21
maka y=21/7=3
cari nilai y
2x + 3y = 5
2x + 3.3 = 5
2x+9 = 5
2x = 5-9=-4
x=-4/2=-2
maka nilai x=-2, dan nilai y=3
4x-y=-11 |x3|
2x+3y = 5
12x-3y = -33 +
14x = -28
x = -2
2x+3y = 5
2.-2+3y = 5
-4+3y = 5
3y = 9
y = 3