» SPLDV

[ a ]

y - x = 0 → y = x ......... pers 1

2x - 5y = 9 ....... pers 2

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substitusi pers 1 ke pers 2

2x - 5y = 9

2x - 5(x) = 9

2x - 5x = 9

-3x = 9

x = 9/-3

x = -3

~~

y = x

y = -3

HP = { -3,-3 }

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[ b ]

x + 4y = 14 ........ pers 1

3x + 7y = 22 ....... pers 2

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Substitusi pers 1 ke pers 2

x + 4y = 14 → x = -4y + 14

3x + 7y = 22

3(-4y + 14 ) + 7y = 22

-12y + 42 + 7y = 22

-12y + 7y = 22 - 42

-5y = -20

y = -20/-5

y = 4

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substitusi y ke perz 1

x + 4y = 14

x + 4(4) = 14

x + 16 = 14

x = 14 - 16

x = -2

HP = { 4,-2 }