Final answer:
To evaluate the algebraic expression when x=10x/2 + 5A, substitute the value of x=10 into the expression and simplify to find the value of A.
Step-by-step explanation:
To evaluate the algebraic expression when x=10x/2 + 5A, we need to substitute the value of x into the expression and simplify.
Substituting x=10, we have:
10 = 10(10)/2 + 5A
Simplifying further:
10 = 100/2 + 5A
10 = 50 + 5A
Now, rearrange the equation:
10 - 50 = 5A
-40 = 5A
Finally, solve for A:
A = -40/5
A = -8
Therefore, when x=10, the value of A in the expression is -8.