Selesaikan SPLDV berikut menggunakan metode Substitusi :

2x – 3y = 7 …(1)

3x + 2y = 4 …(2)

3y = 7 – 2x …(3)

3x + 2(7 – 2x) = 4

3x + 14 – 4x = 4

14 – x = 4

– x = 4 – 14

– x = – 10

x = 10

2x – 3y = 7

2(10) – 3y = 7

20 – 3y = 7

– 3y = 7 + 20

– 3y = 27

y = 27/-3

y = – 9

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2x + y = 5 …(1)

x – y = 1 …(2)

y = 5 – 2x …(3)

x – y = 1

x – 5 – 2x = 1

– 5 – x = 1

– x = 1 + 5

– x = 6

x = – 6

2x + y = 5

2(-6) + y = 5

12 + y = 5

y = 5 – 12

y = – 7

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