Question

4,2 ÷ X + 1, 1/3 / 2, 4/35 - 0,8 = 1, 8/15​

Answer 1

Ответ:

$4.2:x+\frac{1 \ \frac{1}{3}}{2 \ \frac{4}{35}}-0.8=1 \ \frac{8}{15}\\\\ 4.2:x+\frac{\frac{4}{3}}{\frac{74}{35}}-\frac{8}{10}=\frac{23}{15}\\\\ \frac{42}{10} :x+\frac{70}{111}- \frac{8}{10}=\frac{23}{15}\\\\ \frac{21}{5}:x+\frac{700-888}{1110}=\frac{23}{15}\\\\ \frac{21}{5}:x-\frac{188}{1110} =\frac{23}{15}\\\\ \frac{21}{5}:x-\frac{94}{555}=\frac{23}{15}\\\\ \frac{21}{5}:x=\frac{23}{15}+\frac{94}{555}\\\\ \frac{21}{5}:x=\frac{851+94}{555}\\\\ \frac{21}{5}:x=\frac{945 }{555}$

$x=\frac{21}{5}:\frac{945}{555}\\\\ x=\frac{21}{5}\times\frac{555}{945}\\\\ x=\frac{111}{45}\\\\ x=2 \ \frac{21}{45}\\\\x=2\frac{7}{15}$