Question

Himpunan Persaman linear 3x + 2y = 4 dan x - 2y = 8 , nilai x + 2y adalah

Answer 1

Verified answer

Eliminasi y
3x + 2y = 4
x - 2y = 8
_________+
4x = 12
x = 3

mencari y
3(3) + 2y = 4
9 + 2y = 4
2y = 4 - 9
2y = -5
y = -2,5

nilai x + 2y
= 3 + 2(-2,5)
= 3 + (-5)
= -2

Answer 2

Materi : Matematika
Kelas : SMP
Materi : aljabar (-2)

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~cdeschow~