3x + 2y = 12. x + y = 2 maka nilai 2x+ y adalah.... Tolong bantu yaa makasih
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Verified answer
3x + 2y = 12x + y = 2 |×2
3x + 2y = 12
2x + 2y = 4
--------------------(-)
x = 8
x + y = 2
8 + y = 2
y = 2 - 8 = - 6
2x + y
= 2(8) - 6
= 10
Verified answer
Bab Persamaan LinearMatematika SMP Kelas VIII
x + y = 2 → dikali 2 menjadi → 2x + 2y = 4
3x + 2y = 12
2x + 2y = 4
------------------ -
x = 8
x + y = 2
8 + y = 2
y = 2 - 8
y = -6
2x + y = 2 . 8 - 6
= 10