Question

3целых1/5 +(4 целых 1/5х+х):5целых 4/7=8/15

Answer 1

$3 \frac{1}{5} +(4 \frac{1}{5}x+ x):5 \frac{4}{7}= \frac{8}{15} \\3 \frac{1}{5} +5 \frac{1}{5}x:5 \frac{4}{7} = \frac{8}{15} \\ 5 \frac{1}{5} x:5 \frac{4}{7}= \frac{8}{15}-3 \frac{1}{5} \\ 5 \frac{1}{5} x:5 \frac{4}{7} =- \frac{8}{3} \\ 5 \frac{1}{5} x=- \frac{8}{3}*5 \frac{4}{7} \\ 5 \frac{1}{5} x=- \frac{8}{3}* \frac{39}{7} \\ 5 \frac{1}{5} x=- \frac{104}{7} \\ x=- \frac{104}{7}: \frac{26}{5} \\ x=- \frac{104}{7} * \frac{5}{26} \\ x=- \frac{20}{7} \\ x=-2 \frac{6}{7}$