15 4/19+х+3 17/19=21 2/19 29х-11х=504 Помогите срочно!

Question

15 4/19+х+3 17/19=21 2/19

29х-11х=504

Помогите срочно!

Answer 1

15 4/19+х+3 17/19=21 2/19
18 21/19+х=21 2/19
19 2/19+х=21 2/19
х=21 2/19-19 2/19
х=2
*************
29х-11х=504
18х=504
х=504÷18
х=28

Answer 2

Х=21 2/19-3 17/19-15 4/19
Х= 17 4/19- 15 4/19
Х=2

18х=504
Х= 28