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2y = -x + 6
y =
m1 =
karena sejajar maka m1 = m2
y-(-1) =
y + 1 =
y =
(A)
2y=5-x
y=5/2-1/2x, gradiennya -1/2
sejajar, maka gradiennya sama (m=-1/2)
y-y1=m(x-x1)
y+1=-1/2(x-6)
2y+2=-x+6
2y=-x+6-2
2y=-x+4
y=-1/2+2
jawab. a