tentukan himpunan penyelesaian berikut! sistem persamaan 2x - y = 2, x + 2y = 21
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Jawaban:
HP = { 5, 8 }
Penjelasan dengan langkah-langkah:
[tex]2x - y = 2 \\ x + 2y = 21[/tex]
[tex]x + 2y = 21 \\ x = 21 - 2y[/tex]
[tex]2(21 - 2y) - y = 2 \\ 42 - 4y - y = 2 \\ 42 - 5y = 2 \\ - 5y = 2 - 42 \\ - 5y = - 40 \\ 5y = 40 \\ y = \frac{40}{5} \\ y = 8[/tex]
[tex]x = 21 - 2y \\ = 21 - 2(8) \\ = 21 - 16 \\ x= 5[/tex]
Report kalau salah.
Semoga Membantu
2x - y = 2
x + 2y = 21
x = 0
= -y = 2
y = -2
= 2y = 21
y = 21/2
y = 0
= 2x = 2
x = 1
= x = 21
HP {(1,. -2)(21,21/2)}
semoga membantu.
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