30-×=20, ×+1=40, y-8=7

Question

30-×=20, ×+1=40, y-8=7

Comments

незнаю

Answer 1

30-20=10
x=10

40-1=39
x=39

8+7=15
x=15

Answer 2

30-Х=20
Находим Х:
Х=30-20
Х=10
Х+1=40
Х=40-1
Х=39
у-8=7
у=7+8
у=15