Question

3.(x-1)*2=75 làm đầy đủ mik tích điểm nhé !!!

Answer 1

`3*(x-1)*2=75`

`=>6*(x-1)=75`

`=> x-1=75:6`

`=> x-1=25/2`

`=> x=25/2+1=25/2+2/2`

`=> x=27/2`

Vậy ....

Answer 2

\(3.\)\(\left(x-1\right)\)\(.2=75\)

\(\Rightarrow\) \(\left(3.2\right).\) \(\left(x-1\right)\) \(=75\)

6.\(\left(x-1\right)\) \(=75\)

\(x-1\) \(=\) \(\frac{75}{6}\) \(=\) \(12,5\)

\(x=\) \(12,5+1\)

\(x\) \(=\) \(13,5\)

Vậy \(x=13,5\)