Question

Brooke solved the equation below:6r = 726r − 6 = 72 − 6r = 66Is Brooke's solution correct? If the solution is incorrect, explain why it is incorrect and show the correct steps to solve the equation.

Answer 1

Given : Brooke solve equation 6r=72

6r-6=72-6

r=66

Find: why Brooke solution is wrong.

Explanation:

`\begin{gathered} 6r=72 \\ 6r-6=72-6 \\ 6(r-1)=66 \\ r-1=11 \\ r=11+1 \\ r=12 \end{gathered}`

Final answer: the required value of r is 12.