Question

Solve for z. 18 = 3(z – 8)

Answer 1

Given the expression:

$18=3(z-8)$

notice that we can move the 3 that is multiplying the factor z-8 to the left dividing the constant 18:

$\begin{gathered} 18=3(z-8) \\ \Rightarrow\frac{18}{3}=z-8 \\ \Rightarrow6=z-8 \end{gathered}$

now we can add 8 on both sides of the equation to get the following:

$\begin{gathered} 6+8=z-8+8 \\ \Rightarrow14=z \end{gathered}$

therefore, z = 14