ejercicios sistemas

\frac{2}{8}+\frac{5}{x}=\frac{8*5}{2}=20 \frac{7}{6}+\frac{7}{x}=\frac{6*7}{7}=6 \frac{7}{2}+\frac{14}{x}=\frac{2*14}{7}=4 \frac{20}{8}+\frac{8}{x}=\frac{8*8}{20}=3.2 \frac{12}{6}+\frac{6}{x}=\frac{6*6}{12}=3 \frac{5}{4}+\frac{3}{x}=\frac{4*3}{5}=2.4 \frac{12}{2}+\frac{9}{x}=\frac{2*9}{12}=1.5 \frac{20}{8}+\frac{30}{x}=\frac{8*30}{20}=12 \frac{13}{15}+\frac{16}{x}=\frac{16*15}{13}=18.46 \frac{26}{21}+\frac{5}{x}=\frac{21*5}{26}=4.03