Question

ayuda porfavor es un examen ​

Answer 1

Verified answer

Respuesta:

=-2

Explicación paso a paso:

[tex]\left(\frac{1}{5}+\frac{1}{4}\right)\div \frac{9}{20}-\left(3-\frac{3}{5}\right)\cdot \frac{15}{12}[/tex]

[tex]=\left(\frac{1}{5}+\frac{1}{4}\right)\div \frac{9}{20}-\left(3-\frac{3}{5}\right)\frac{5}{4}[/tex]

[tex]=\frac{9}{20}\div \frac{9}{20}-\left(3-\frac{3}{5}\right)\frac{5}{4}[/tex]

[tex]=\frac{9}{20}\div \frac{9}{20}-\frac{12}{5}\cdot \frac{5}{4}[/tex]

[tex]=1-\frac{12}{5}\cdot \frac{5}{4}[/tex]

[tex]=1-3[/tex]

[tex]=-2[/tex]

Espero te sierva,  te agradecería si me das corona

:)