Respuesta :

[tex]5x + x + y + 2x = 180 \\ y = 28 \\ 5x + x + 28 + 2x = 180 \\ 8x + 28 = 180 \\ 8x = 180 - 28 \\ 8x = 152 \\ x = 19[/tex]

x=?
y=28
2•x+x+y+5•x=180
2x+x+5x+28=180
8x=180-28
8x=152
x=152/8
x=18
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