Question

acabo de empezar en brainly alguien me ayuda 1/4a+7/2=8/5a+9/4

Answer 1

Explicación paso a paso:

$\frac{1}{4} a + \frac{7}{2} = \frac{8}{5} a + \frac{9}{4} \\ \\ \frac{1}{4} a - \frac{8}{5} a = \frac{9}{4} - \frac{7}{2} \\ \\ \frac{5 - 32}{20} a = \frac{9 - 14}{4} \\ \\ - \frac{27}{20} a = - \frac{5}{4} \\ \\ a = - \frac{5}{4} \div ( - \frac{27}{20}) \\ \\ a = \frac{100}{108} \\ \\ a = \frac{25}{27}$