Answer:
The simplified form of the given expression is 8.9x+1.66.
Step-by-step explanation:
The given expression is

We need to find the simplified form of the given expression.
If two terms have same variables of same degree then they are called like terms.
In the given expression 5.3x and 3.6x are like terms and -8.14 and 9.8 are like terms.
On combining like terms we get



Therefore, the simplified form of the given expression is 8.9x+1.66.