Question

2х:6=21:18 помогите​

Answer 1

Ответ:

2х÷6=21/18

2х÷6=7/6

2х=7/6×6/1

2х=7

х=3,5

Answer 2

Ответ:

$\frac{2x}{6} =\frac{21}{18} \\\\\frac{x}{3} =\frac{7}{6} \\\\6x = 21\\\\x=\frac{7}{2} =3\frac{1}{2}=3,5$