Dik persamaan linear 2 variabel 10a-4b =36,nilai b =12 maka nilai a?

Mapel : Matematika

Kelas : 7

Bab : SPLDV


→ 10a - 4b =36

→ b = 12


Ditanya :
→ Nilai a =...?


Jawaban :


10a - 4b = 36

10a - 4(12) = 36

10a - 48 = 36

10a = 36 + 48

10a = 84

a = 84/10

a = 8,4 ✔

[tex]10a - 4b = 36 \\ 10a - (4 \times 12) = 36 \\ 10a - 48 = 36 \\ 10a = 36 + 48 \\ 10a = 84 \\ a = 8.4[/tex]
Maka a=8,4
Maad ya kalau salah