Final answer:
To solve the expression 4x + 5 when x = 3, substitute the value of x into the expression and simplify. The result is 17.
Step-by-step explanation:
To solve the expression 4x + 5 when x = 3, we substitute the value of x into the expression:
4(3) + 5 = 12 + 5 = 17
Therefore, the value of 4x + 5 when x = 3 is 17.
Learn more about Solving algebraic expressions