Question

Решите уравнения 2/9×x=5/12; 4/15 ×y=2/5; 3/5×x=6; 7/8×y=14; 3/7×x=1 4/5; 9/10×y=4 1/2

Answer 1

2/9×х=5/12
х=5/12÷2/9
х=5/12×9/2=15/8=1 7/8

4/15×у=2/5
у=2/5÷4/15
у=2/5×15/4=6/2=3

3/5×х=6
х=6÷3/5=6×5/3=10

7/8×у=14
у=14÷7/8=14×8/7=16

3/7×х=1 4/5
х=9/5÷3/7=9/5×7/3=21/5=4 1/5

9/10×у=4 1/2
у=9/2÷9/10=9/2×10/9=5

Answer 2

$\frac{2}{9}*x=\frac{5}{12}$
$x=\frac{5}{12}* \frac{9}{2}$
$x=\frac{45}{24}$
$x=1\frac{21}{24}$
$x=1\frac{7}{8}$

$\frac{4}{15}*y=\frac{2}{5}$
$y=\frac{2}{5}* \frac{15}{4}$
$y=\frac{1}{1}* \frac{3}{2}$
$y=\frac{3}{2}$

$\frac{3}{5}*x= 6$
$x= 6* \frac{5}{3}$
$x=\frac{6}{1}*\frac{5}{3}$
$x=\frac{2}{1}*\frac{5}{1}$
$x=10$

$\frac{7}{8}*y=14$
$y=\frac{14}{1}* \frac{8}{7}$
$y=\frac{2}{1}* \frac{8}{1}$
$y=16$

$\frac{3}{7}*x= 1\frac{4}{5}$
$x=\frac{9}{5}*\frac{7}{3}$
$x=\frac{63}{15}$
$x=4\frac{1}{5}$

$\frac{9}{10}*y=4\frac{1}{2}$
$y=\frac{9}{2}*\frac{10}{9}$
$y=\frac{1}{1}*\frac{5}{1}$
$y=5$