Simplify the Expression: 3.4-3.4a+2.6b-7.5a with Like Terms

To solve this problem, we'll follow these steps:

• Identify the terms involving the same variables.
• Combine like terms, particularly those involving $a$.
• Simplify the expression based on the calculations.

Now, let's work through each step:
Step 1: The given expression is $3.4 - 3.4a + 2.6b - 7.5a$.
Step 2: Identify the like terms:
- The terms with $a$ are $-3.4a$ and $-7.5a$.
Step 3: Combine these like terms:
- Calculate $-3.4a - 7.5a = (-3.4 - 7.5)a = -10.9a$.
Step 4: Substitute back into the expression:
- The simplified expression is $3.4 - 10.9a + 2.6b$.

Therefore, the solution to the problem is $3.4 - 10.9a + 2.6b$.