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1)
titik y= 3
titik x= -5
⇒ 3x-5y= 3 × (-5)
= 3x-5y= -15
2)
titik y= 2
titik x= 4
⇒ 2x+4y= 2 × 4
= 2x+4y= 8 ; bagi 2
= x+2y= 4
3)
titik y= 4
titik x= 8
⇒ 4x+8y= 4 × 8
= 4x+8y= 32 ; bagi 4
= x+2y= 8
4)
titik y= 2
titik x= 1
⇒ 2x+1y= 2 × 1
= 2x+y= 2
5)
titik y= 4
titik x= 2
⇒ 4x+2y= 4 × 2
4x+2y= 8 ; bagi 2
2x+y= 4