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2x+ y = 11
= -2/1
= -2
persamaan garis
y -y1 = m1(x-x1)
y - 3 = -2 ( x - 4)
y - 3 = -2x + 8
y = -2x + 8 + 3
y = -2x + 11
atau
2x + y - 11 = 0