Question

por favor alguin ayudeme​

Answer 1

34.

$\mathrm{Quitar\:los\:parentesis}:\quad \left(a\right)=a\\=-\frac{1}{2}+\frac{3}{7}-\left(\frac{1}{4}-\frac{5}{2}\right)-\left(\frac{3}{2}-\frac{5}{4}\cdot \frac{1}{7}\right)\\-\left(\frac{1}{4}-\frac{5}{2}\right)=\frac{9}{4}\\-\left(\frac{3}{2}-\frac{5}{4}\cdot \frac{1}{7}\right)=-\frac{37}{28}\\\mathrm{Minimo\:comun\:multiplo\:de\:}2,\:7,\:4,\:28:\quad 28\\\mathrm{Reescribir\:las\:fracciones\:basandose\:en\:el\:minimo\:comun\:denominador}\\=-\frac{14}{28}+\frac{12}{28}+\frac{63}{28}-\frac{37}{28}$

$\mathrm{Sumar/restar\:lo\:siguiente:}\:-14+12+63-37=24\\=\frac{24}{28}\\\mathrm{Eliminar\:los\:terminos\:comunes:}\:4\\=\frac{6}{7}$

35.

$\mathrm{Quitar\:los\:parentesis}:\quad \left(a\right)=a,\:-\left(-a\right)=a\\=\left(\frac{5}{3}+\frac{2}{5}-\frac{\frac{4}{3}}{\frac{1}{2}}\right)\left(-\frac{3}{5}+\frac{7}{2}\right)\\\frac{\frac{4}{3}}{\frac{1}{2}}=\frac{8}{3}\\=\left(\frac{5}{3}+\frac{2}{5}-\frac{8}{3}\right)\left(\frac{7}{2}-\frac{3}{5}\right)\\\mathrm{Simplificar}\:-\frac{3}{5}+\frac{7}{2}\:\mathrm{en\:una\:fraccion}:\quad \frac{29}{10}\\=\frac{29}{10}\left(\frac{5}{3}+\frac{2}{5}-\frac{8}{3}\right)$

$\mathrm{Combinar\:las\:fracciones\:usando\:el\:minimo\:comun\:denominador}:\quad -1\\=\frac{29}{10}\left(\frac{2}{5}-1\right)\\\mathrm{Simplificar}\:-1+\frac{2}{5}\:\mathrm{en\:una\:fraccion}:\quad -\frac{3}{5}\\=\left(-\frac{3}{5}\right)\frac{29}{10}\\\mathrm{Quitar\:los\:parentesis}:\quad \left(-a\right)=-a\\=-\frac{3}{5}\cdot \frac{29}{10}\\\mathrm{Multiplicar\:fracciones}:\quad \frac{a}{b}\cdot \frac{c}{d}=\frac{a\:\cdot \:c}{b\:\cdot \:d}\\=-\frac{3\cdot \:29}{5\cdot \:10}$

$\mathrm{Multiplicar\:los\:numeros:}\:3\cdot \:29=87\\=-\frac{87}{5\cdot \:10}\\\mathrm{Multiplicar\:los\:numeros:}\:5\cdot \:10=50\\=-\frac{87}{50}$