Final answer:
To simplify the expression 3.5x+1/2+2.5x-3, combine like terms to get 6x for the terms with 'x' and -2.5 for the constant terms, resulting in the simplified expression 6x - 2.5.
Step-by-step explanation:
The question asks to write an expression equivalent to 3.5x+1/2+2.5x-3. This is a mathematical expression that can be simplified by combining like terms. First, combine the terms that have 'x' to get 6x. Then, combine the constant terms: 1/2 and -3. The simplified expression is 6x - 2.5.