[tex]100\% - 20\% = 80\% \\ \frac{180}{x} = \frac{100}{80} \\ 180 \: . \: 80 = 100 \: . \: x \\ 14 \: 400 = 100x \\ 100x = 14 \: 400 \\ x = \frac{14 \: 400}{100} \\ \boxed{\boxed{\boxed{x = 144}}} \\ [/tex]

att. yrz

Resposta:

144

Explicação passo-a-passo:

180_____100%

x______80%

100x=80*180

100x=14.400

x =14400/100

x=144