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

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

• A. 4
• B. 5
• C. 6
• D. 7

Answer: (B)

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.

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.