This formula converts a UK shoe size to a Japanese shoe size. Japanese size = UK size + 19 Yuto wears a Japanese size 29.5.
What would Yuto’s shoe size be in the UK?

Yuto wears a Japanese size 29.5.

By the problem,

Japanese size = UK size + 19

Or, 29.5 = UK size +19

Or, UK size = 29.5-19 = 10.5

Yuto’s shoe size would be 10.5 in the UK

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^