If 2x + 3 = 9, what is x?

To find the value of ( x ) in the equation ( 2x + 3 = 9 ), you start by isolating ( x ).

First, subtract 3 from both sides of the equation:

[

2x + 3 - 3 = 9 - 3

]

This simplifies to:

[

2x = 6

]

Next, to solve for ( x ), you need to divide both sides of the equation by 2:

[

x = \frac{6}{2}

]

This results in:

[

x = 3

]

Thus, the solution to the equation is ( x = 3 ). This is why the selected answer is correct. It appropriately demonstrates the steps needed to isolate the variable and solve the equation systematically. Understanding how to manipulate the equation through addition, subtraction, and division is essential in working with algebraic expressions.