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- 3y = - 4x - 12
y = (4/3)x + 4
m = 4/3
2) 3x - 9y = 30
3x + 2y = - 3
___________ _
- 11y = 33
y = - 3
x = 1
gradien tegak lurusnya:
- 3y = - x + 10
y = (1/3)x - 10/3
m₂ = - 3
y - b = m(x - a)
y + 3 = - 3(x - 1)
y = 3x
gak lengkap soal nmr 2 nya