Question

Solve the equation. Check your solution.

$4=9z-2$

Answer 1

Explanation:

Given,equation

$$\begin{gathered} 4=9z-2 \\ \Rightarrow 4+2=9z \\ \Rightarrow 6=9z \end{gathered}$$

$$\begin{gathered} \Rightarrow \frac{6}{9}=z \\ \Rightarrow 0.67=z \end{gathered}$$

Verification:
Substitute $z=0.67$ in Equation

$$\begin{gathered} RHS:9z-2 \\ \Rightarrow (9\times 0.67)-2 \\ \Rightarrow 6-2 \\ =4 \\ =LHS \end{gathered}$$

Hence,the value of $z=0.67$