Final answer:
To solve the equation 10a = 31.2, divide both sides by 10, resulting in a = 3.12 as the solution.
Step-by-step explanation:
To determine the value of a in the equation 10a = 31.2, begin by identifying the knowns and the unknown.
The known is 31.2, and the unknown is the variable a.
To find a, you should isolate the variable on one side of the equation.
This can be done by dividing both sides of the equation by 10, which is the coefficient of a.
So the equation becomes a = 31.2 / 10.
Performing the division gives you a = 3.12.
This is the solution to the equation, which means a is valued at 3.12.