Question

45+a=?y:0,3=?45,5-x=?​

Answer 1

45 + a = a + 45
y ÷ 0.3 = 3.33y (якщо y - число)
45.5 - x = 45.5 - x

Answer 2

It seems like you've provided a set of equations and expressions, but they're not entirely clear. Let's break them down:

1. "45 + a = ?y"
2. "0,3 = ?45"
3. "5 - x = ?"

It's not clear what you mean by "?y" and "?45." If you're looking to solve for the variables a and x in these equations, you would need more information or context. Please provide additional details or clarify your question so I can assist you further.