Question

22
30
508. Решите уравнения:
9
1) x:
- 1;
10
16
игр2) x:19 =
;19
3) x: 3 =
со 1 от
129нунужно срочно
9-380​

Answer 1

$\displaystyle x:\frac{9}{10} =1\\x*\frac{10}{9} =1\\\frac{10}{9} x=1~~~~~~~|*\frac{9}{10} \\x=\frac{9}{10} =0,9;\\\\x:19=\frac{16}{19} \\\frac{1}{19} x=\frac{16}{19} ~~~~|*19\\x=16;\\\\x:3=\frac{5}{9} \\\frac{1}{3} x=\frac{5}{9} ~~~~~|*3\\x=\frac{5}{3}=1\frac{2}{3}$