1)
x*35 = 36*7
x*35 = 252
x = 252:35
x = 7,2
2)
x*36 = 27*3,75
x*36 = 101,25
x = 2,8125
3)
x*4 = 18*12
x*4 = 216
x = 216:4
x = 54
1)![\frac{x}{36} = \frac{7}{35}](/tpl/images/0966/1808/9362b.png)
x*35 = 36*7
x*35 = 252
x = 252:35
x = 7,2
2)![\frac{36}{27} = \frac{3,75}{x}](/tpl/images/0966/1808/33fc5.png)
x*36 = 27*3,75
x*36 = 101,25
x = 2,8125
3)![\frac{18}{4} = \frac{x}{12}](/tpl/images/0966/1808/bd7a7.png)
x*4 = 18*12
x*4 = 216
x = 216:4
x = 54