Question

Решите уравнение
(x + 4/21) - 4/15 = 16/35
3 5/36 - (1 4/9 - x) = 1 17/18​

Answer 1

Пошаговое объяснение:

$(x + \frac{4}{21}) -\frac{4}{15} =\frac{16}{35} \\$

$x=\frac{16}{35} -\frac{4}{21} +\frac{4}{15} =\frac{16*3-4*5+4*7}{3*5*7} =\frac{56}{3*5*7} =\frac{7*8}{3*5*7} =\frac{8}{15}$

$3\frac{5}{36}-(1\frac{4}{9}-x)=1\frac{17}{18}$

$\frac{113}{36}-\frac{13}{9}+x=\frac{35}{18}$

$x=\frac{35}{18} - \frac{113}{36}+\frac{13}{9}=\frac{70-113+52}{36} =\frac{9}{36} =\frac{1}{4}$