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a=-1
b=2
gradien : m=-b/a = -2/(-1) = 2
karena sejajar, maka
m1 = m = 2
(-2,3)
x1 = -2
y1 = 3
pers garis yang dimaksud adalah
y-y1 = m(x-x1)
y-3 = 2(x-(-2))
y-3 = 2(x+2)
y-3 = 2x+4
y-2x-7 = 0
y = 2x - 5
m = 2
(-2,3)
y-y1 = m (x-x1)
y- 3 = 2 (x+2)
y - 3 = 2x + 4
y = 2x + 7