Question

gia tri tuyet doi cua 3x-2 tat ca +5=-x+9

Tim x ,giup mk nhaCam on moi nguoi!

Answer 1

\(\Rightarrow\)trị tuyệt đối 3x-2= -x +9-5=-x+4

\(\Rightarrow\hept{\begin{cases}3x-2=-x+4\Rightarrow\\3x-2=x-4\Rightarrow\end{cases}\hept{\begin{cases}x=loại\\x=-1\end{cases}}}\)

Answer 2

Nhung de dau co ra la x thuoc Z dau?

Answer 3

\(\Rightarrow\hept{\begin{cases}3x-2=-x+4\Rightarrow\\3x-2=x-4\Rightarrow\end{cases}\hept{\begin{cases}x=loại\\x=-1\end{cases}}}\)

Answer 4

Du gi cung cam on ban nhe!hihi

Answer 5

\(\left|3x-2\right|+5=x+9\)

\(\Leftrightarrow\left|3x-2\right|=x+9-5\)

\(\Leftrightarrow\left|3x-2\right|=x+4\)

\(\Leftrightarrow\orbr{\begin{cases}3x-2=x+4\\3x-2=4-x\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=3\\x=\varnothing\end{cases}}\)

Vậy x = 3