The given expression is:
8 + 5 + 2c + 7c
To simplify this expression, we can combine the like terms (terms with the same variable and exponent). In this case, we have two terms with the variable "c", namely 2c and 7c. These terms can be combined by adding their coefficients:
2c + 7c = (2 + 7)c = 9c
So the equivalent expression is:
8 + 5 + 9c
which can be simplified further by adding the constants:
8 + 5 = 13
Therefore, the final simplified expression is:
13 + 9c