Answer:
We can solve the equation by simplifying and rearranging terms.
First, let's combine like terms on the left side of the equation:
8 - 3a + 13 = 2a
Combine the constants (8 + 13):
21 - 3a = 2a
Next, let's isolate the variable terms. We can do this by adding 3a to both sides of the equation:
21 - 3a + 3a = 2a + 3a
Simplifying:
21 = 5a
Finally, we can solve for a by dividing both sides of the equation by 5:
21/5 = a
The answer is:
a = 4.2
