\(70-5.\left(x-3\right)=45\)
\(5.\left(x-3\right)=70-45\)
\(5.\left(x-3\right)=25\)
\(\left(x-3\right)=25:5\)
\(\left(x-3\right)=5\)
\(x=5+3\)
\(x=8.\)
\(\left(2x-1\right)^3=343\)
\(2x=343+1\)
\(2x=344\)
\(x=344:2\)
\(x=172.\)
( Bài này mk cũng ko chắc là lm đúng hay ko, nếu có j sai mong bn thông cảm cho mk )
_Hok tốt_
\(70-5.\left(x-3\right)=45\)
\(5.\left(x-3\right)=70-45\)
\(5.\left(x-3\right)=25\)
\(x-3=25:5\)
\(x-3=5\)
\(x=5+3\)
\(x=8\)
Quyền Như bn lm sai ròi
\(\left(2x-1\right)^3=343\)
\(\Rightarrow\left(2x-1\right)^3=7^3\)
\(\Rightarrow2x-1=7\)
\(2x=7+1\)
\(2x=8\)
\(x=8:2\)
\(x=4\)
70-5.(x-3)=45
5.(x-30)=70-45
5.(x-3)=25
x-3=25:5
x-3=5
x=5+3
x=8
