Question

2 (x-172)-111=156 

Answer 1

\(\Rightarrow2\left(x-172\right)=156+111\\ \Rightarrow2\left(x-172\right)=267\\ \Rightarrow x-172=\dfrac{267}{2}\\ \Rightarrow x=\dfrac{267}{2}+172\\ \Rightarrow x=\dfrac{267+2\times172}{2}\\ \Rightarrow\dfrac{267+344}{2}=\dfrac{611}{2}\)

Answer 2

\(2\left(x-172\right)-111=156\)

\(\Rightarrow2\left(x-172\right)=156+111\)

\(\Rightarrow2\left(x-172\right)=267\)

\(\Rightarrow x-172=\dfrac{267}{2}\)

\(\Rightarrow x=\dfrac{267}{2}+172\)

\(\Rightarrow x=\dfrac{267}{2}+\dfrac{172\cdot2}{2}\)

\(\Rightarrow x=\dfrac{267}{2}+\dfrac{344}{2}\)

\(\Rightarrow x=\dfrac{611}{2}\)