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2x + 3y = -16 l x1 l
9x + 3y = -30
2x + 3y = -16
------------------- -
7x = -14
x = -2
Substitusikan
3x + y = 10
3.(-2) + y = -10
-6 + y = -10
y = -10 + 6
y = -4
Nilai 3x - 2y = 3(-2) - 2(-4) = -6 + 8 = 2 (B)
19) Titik (-6, 0) dan (3, 3)
Gunakan rumus
9y = 3x + 18
y = x + 2 (B)