Question

[trang xinh gai]

tifm x

4.(x-2)+10=5-3x

4x-8-10=7-x

14.(x-6)=-7.(3+2)=13.x

35.(4-3)-3.x=8-4.x

|2x-1|=3

|1-2x|=5

|4+x|=10

giải gìm mk nha mk sắp kiểm tra rùi

Answer 1

[Đặng Tú Phương]

\(4\left(x-2\right)+10=5-3x\)

\(\Rightarrow4x-8+10=5-3x\)

\(\Rightarrow4x+3x=5-10+8\)

\(\Rightarrow7x=3\)

\(\Rightarrow x=\frac{3}{7}\)

\(4x-8-10=7-x\)

\(\Rightarrow4x+x=7+10+8\)

\(\Rightarrow5x=25\)

\(\Rightarrow x=5\)

\(\left|2x-1\right|=3\)

\(\Leftrightarrow\orbr{\begin{cases}2x-1=3\\2x-1=-3\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2\\x=-1\end{cases}}}\)

\(\left|1-2x\right|=5\)

\(\Leftrightarrow\orbr{\begin{cases}1-2x=5\\1-2x=-5\end{cases}\Leftrightarrow\orbr{\begin{cases}x=-2\\x=3\end{cases}}}\)

\(\left|4+x\right|=10\)

\(\Leftrightarrow\orbr{\begin{cases}4+x=10\\4+x=-10\end{cases}\Leftrightarrow\orbr{\begin{cases}x=6\\x=-14\end{cases}}}\)