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x₂ -x₁
3 = 3x -3 -2
4 -(6 -2x)
3 = 3x -5
-2 +2x
3(-2 +2x) = 3x -5
-6 +6x = 3x -5
6x -3x = -5 +6
3x = 1
x = 1/3
2. Maaf yang no. 2 saya tidak tahu.
3. a. y -y₁ = m(x -x₁)
y -3 = -1(x -0)
y -3 = -x
y = -x +3
x +y -3 = 0
b. y -y₁ = m(x -x₁)
y -3 = -1(x -(-2))
y -3 = -x -2
y = -x -2 +3
y = -x +1
x +y -1 =