Question

Помогите с уравнениями!!!!

X + 1 8/13x = 34

1 6/7x + x = 20

( 3 6/7 + 3/14 )x = 2/7 * 3 1/2

Answer 1

1)х+21/13*х=34
13х+21х=34•13
34х=34•13
х=13
2)13х/7+х=20
20х=7•20
х=7
3)(21/7+3/14)х=2/7*7/2
(42+3)/14*х=1
45х/14=1
х=14/45