Resposta:
[tex]x + 2x + x + 20 = 180[/tex]
[tex]4x = 180 - 20[/tex]
[tex]4x = 160[/tex]
[tex]x = \frac{160}{4} [/tex]
[tex]x = 40[/tex]
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Resposta:
[tex]x + 2x + x + 20 = 180[/tex]
[tex]4x = 180 - 20[/tex]
[tex]4x = 160[/tex]
[tex]x = \frac{160}{4} [/tex]
[tex]x = 40[/tex]