calcule o valor de x em cada triangulo.... Pergunta de ideia deWilliamParker

WilliamParker @WilliamParker

October 2020 1 90 Report

calcule o valor de x em cada triangulo.

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Teorema de Tales:

a)
$\frac{2x}{3x+1}=\frac{6,5}{11}\Rightarrow 19,5x+6,5=22x \Rightarrow 2,5x=6,5 \Rightarrow x=2,6$

b)
$\frac{x}{14,7}=1 \Rightarrow x=14,7$

c)
$\frac{x}{4}=\frac{21}{3} \Rightarrow \frac{x}{4}=7 \Rightarrow x=28$

d)
$\frac{7}{2x}=\frac{7}{18}\Rightarrow 2x=18 \Rightarrow x=9$

e)
$\frac{15}{6}=\frac{x+7}{8}\\
\\
6x+42=120\\
\\
6x=120-42\\
\\
6x=78\\
\\
x=13$

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