Question

120 - 5 (x - 1) = 2³ . 5

Answer 1

120 - 5 (x-1) =8.5

120 - 5 (x-1) =40

5 (x-1) =120 - 40

5 (x-1) =80

x - 1 =80 :5

x - 1 =16

x =16+1

x =17

Answer 2

120 - 5 (x - 1) = 2³ . 5

120 - 5 (x - 1) = 8 . 5

120 - 5 (x - 1) = 40

5 (x - 1) = 120 - 40

5 (x - 1) = 80

x - 1 = 80 : 5

x - 1 = 16

x = 16 + 1

x = 17

Answer 3

\(120-5\left(x-1\right)=2^3.5\)
\(120-5\left(x-1\right)=8.5\)
\(120-5\left(x-1\right)=40\)
\(5\left(x-1\right)=120-40\)
\(5\left(x-1\right)=80\)
\(x-1=\frac{80}{5}\)
\(x-1=16\)
\(x=16+1\)
\(x=17\)