Simplifying the Expression: (4−5y)−2(3.5y−8)
This expression involves combining like terms and applying the distributive property. Here's how to simplify it stepbystep:

Distribute the 2:
 Multiply 2 by both terms inside the parentheses:
 (4  5y) + (2 * 3.5y) + (2 * 8)
 (4  5y)  7y + 16

Combine like terms:
 Group the 'y' terms and the constant terms together:
 (5y  7y) + (4 + 16)

Simplify:
 (12y) + 20
Therefore, the simplified expression is 12y + 20.