Tentukan penyelesaian sistem persamaan berikut dengan metode eliminasi

4x + 5y = -2
8x - 5y = 5

20 16 ​ = 20 16 ​ × 100% = 16 × 5% = 80% ​

Answered by Anonymous | 2024-06-10

When you divide 16 by 20, you get the decimal 0.80 .
That's the same as 80% .
We hope it was not a math test.

Answered by AL2006 | 2024-06-10

You scored 80% on the test by calculating 20 16 ​ × 100% . This indicates a good understanding of the material covered in the test.
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Answered by Anonymous | 2024-10-31

Jawaban:Penyelesaian : Tentukan penyelesaian sistem persamaan berikut dengan metode eliminasi!4x + 5y = -28x - 5y = 5Diketahui : 4x + 5y = -2 ... pers (I)8x - 5y = 5 ... pers (II)Jawab : Eliminasi y dari pers (I) dan (II)[tex] \sf 4x + \cancel{ \red{5y}} = - 2 \: \: \: \: \\ \sf \underline{8x - \cancel{ \red{5y }}= 5} \: ( + ) \\ \sf 12x = 3 \\ \: \: \: \: \: \: \: \sf x = \frac{3}{12} \\ \: \: \: \: \: \sf x = \frac{1}{4} [/tex]Eliminasi x dari pers (I) dan (II)[tex] \sf 4x + 5y = - 2 | \times 2| \cancel{ \red{ 8x }}+ 10y = - 4 \: \: \: \: \: \\ \sf \underline{ 8x - 5y = 5 | \times 1| \cancel{ \red{8x}} - 5y = 5 } \: ( - ) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf 15y = - 9 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf y = \frac{ - 9 }{15} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \sf y = - \frac{3}{5} [/tex]Jadi, penyelesaian sistem tersebut adalah [tex]\sf HP = \{ \frac{1}{4} , - \frac{3}{5} \} [/tex]

Answered by ItsMeAliya | 2025-08-24

Penjelasan dengan langkah-langkah:4x + 5y = - 2 (× (-1))8x - 5y = 5 (×1)- 4x - 5y = 2 8x - 5y = 5 _- 12x = - 3x = (-3)/(-12) = ¼4x + 5y = - 2 (×2)8x - 5y = 5 (×1)8x + 10y = -48x - 5y = 5 _15y = - 9y = (-9)/15 = - ⅗

Answered by arnymatematika | 2025-08-24