101 Disney Songs: for Violin (VIOLON)

101 Disney Songs: for Violin (VIOLON)

Matematika Perhatikan Gambar dibawah ini!. nilai x adalah.....
a.17
b.18
c.19
d.20​

Perhatikan Gambar dibawah ini!. nilai x adalah.....
a.17
b.18
c.19
d.20​

Jawaban:

[tex]C. \: \: 19°[/tex]

Penjelasan dengan langkah-langkah:

[tex](3x - 10)° +(2x + 5)° = 90° \\ 3x° - 10° + 2x° + 5° = 90° \\ 5x° - 5° = 90° \\ 5x° = 90° + 5° \\ 5x° = 95° \\ x° = \frac{95°}{5°} \\ x° = 19°[/tex]

-sy

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