Final answer:
The value of 5x+3 when x=4 is 23.
Step-by-step explanation:
To find the value of 5x+3 when x=4, we substitute the value of x into the expression:
5(4) + 3 = 20 + 3 = 23
Therefore, the value of 5x+3 when x=4 is 23.
Learn more about Solving algebraic expressions