Question

Уравнение 3 1/3 разделить на ( 3/7 х -13/15)=1 9/16

Answer 1

$3 \frac{1}{3}:( \frac{3}{7}x- \frac{13}{15} ) =1 \frac{9}{16}$
$\frac{3}{7}x- \frac{13}{15} = 3 \frac{1}{3}:1 \frac{9}{16}$
$3 \frac{1}{3}:1 \frac{9}{16}= \frac{10}{3}* \frac{16}{25} = \frac{2*16}{3*5}= \frac{32}{15}$
$\frac{3}{7}x- \frac{13}{15} = \frac{32}{15}$
$\frac{3}{7}x= \frac{32}{15}+ \frac{13}{15}$
$\frac{3}{7}x= \frac{45}{15}$
$\frac{3}{7}x=3$
$x=3: \frac{3}{7}$
$3: \frac{3}{7}= \frac{3}{1}* \frac{7}{3}=7$
x=7