Respuesta :

[tex]\bf \cfrac{7a}{-9}\div \cfrac{5b}{-3}\implies \cfrac{7a}{\underset{3}{~~\begin{matrix} -9 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\cdot \cfrac{~~\begin{matrix} -3 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}{5b}\implies \cfrac{7a}{15b}[/tex]

Answer: Factor out the greatest common factor which is 3.

1. [tex]\frac{7a}{3*-3} *\frac{3*-1}{5b}[/tex]

Answer is 7a/15b