Question

решите уровнение дам 10 баллов за всё задание ​

Answer 1

$1)\frac{7}{21}=\frac{3x}{54}\\\frac{1}{3}=\frac{x}{18} \\18=3x\\3x=18\\x=6\\2) \frac{11}{33}=\frac{2}{3x}\\\frac{1}{3}=\frac{2}{3x}\\3x=6\\x=2\\3) \frac{8}{5}=\frac{4x}{15}\\120=20x\\20x=120\\x=6$

Answer 2

3) 7/21 = 3х/54

1/3 = х/18

х = 1*18/3 = 6

4) 11/33 = 2/3х

1/3 = 2/3х

3х = 3*2/1

3х = 6

х = 2

5)8/5 = 4х/15

4х = 8*15/5

4х = 24

х = 6