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Mapel : Matematika
Bab : Sistem Persamaan Linear Satu Variabel

Diketahui :
- Bilangan Ganjil Pertama = x
- Bilangan Ganjil Kedua = x + 2
- Bilangan Ganjil Ketiga = x + 4
- 3B₁ + B₂ = B₃ + 7

Ditanya :
- Nilai B₁ = ......?
- Nilai B₂ = ......?
- Nilai B₃ = ......?
- Nilai B₁ + B₂ + B₃ = ......?

Penyelesaian :
- Nilai B₁ :
3B₁ + B₂ = B₃ + 7
3x + (x + 2) = (x + 4) + 7
3x + x + 2 = x + 4 + 7
4x + 2 = x + 11
4x - x = 11 - 2
3x = 9
x = 9/3
x = 3

- Nilai B₂ :
B₂ = x + 2
B₂ = 3 + 2
B₂ = 5

- Nilai B₃ :
B₃ = x + 4
B₃ = 3 + 4
B₃ = 7

- Nilai B₁ + B₂ + B₃ :
B₁ + B₂ + B₃
= 3 + 5 + 7
= 15

Jawaban : B. 15

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