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x - 2y + 2 = 0 dan
2x + ay = -3
sejajar
berarti
m1 = m2
-1/-2 = -2/a
1/2 = -2/a
a = 2(-2)
a = -4
no 6)
cari tipotnya dulu..
x - 2y = -14 --> 2x - 4y = -28
2x + 3y = 0 --> 2x + 3y = 0
---------------------------------------- -
-7y = -28
y = 4
2x + 3y = 0
2x + 12 = 0
2x = -12
x = -6
tipot (-6,4)
persamaan garis yg gradien m = 3 dan melalui tipot (-6,4) =
y - 4 = 3 (x+6)
y - 4 = 3x + 18
y = 3x + 22
3x - y + 22 = 0