If 3x + 4 = 19, what is the value of x?

To find the value of ( x ) in the equation ( 3x + 4 = 19 ), you should isolate ( x ) by following these steps:

1. Subtract ( 4 ) from both sides of the equation:

[ 3x + 4 - 4 = 19 - 4 ] This simplifies to:

[ 3x = 15 ]

2. Next, divide both sides by ( 3 ) to solve for ( x ):

   [ \frac{3x}{3} = \frac{15}{3} ] This further simplifies to:

   [ x = 5 ]

Thus, the correct value of ( x ) is ( 5 ). This demonstrates a clear and methodical approach to solving a linear equation, ensuring that you maintain balance on both sides whilst isolating the variable.