234-y=220, 72:b+13=19?

Question

234-y=220, 72:b+13=19?

Answer 1

234-у=220
у=234-220
у=14


72:ь+13=19
72:ь=19-13
72:ь=6
ь=72:6
ь=12

Answer 2

У=234-220
у=14

72:b=19-13
72:b=6
b=72:6
b=12