X- 3/7 = 4/21. 5/8-x = 1/3

Question

X- 3/7 = 4/21. 5/8-x = 1/3

Answer 1

Х-3/7=4/21
х=4/21+3/7
х=4/21+9/21
х=13/21

5/8-х=1/3
5/8-1/3=х
15/24-8/24=х
х=7/24

Answer 2

Х-3/7=4/21
х=4/21+9/21
х=13/21

5/8-х=1/3
-х=8/24-15/24
-х=-7/24
х=7/24