tolong bantu di jwb ya pakai cara dan gambar pliss bsk dikumpul

nomor 8 saja ya...
a.
[tex]6x + 90 + 3x + 90 = 360 \\ 9x + 180 = 360 \\ 9x = 360 - 180 \\ 9x = 180 \\ x = \frac{180}{9} = 20[/tex]



b.
[tex]90 + 3y + 2y + 65 = 360 \\ 7y + 155 = 360 \\ 5y = 360 - 155 \\ 7y = 205 \\ y = \frac{205}{5} = 41[/tex]


tulisan nya terlalu keren,,,
masyaallah..