ko ghi lại đề nha !
6x - 12 - 2 = 20 - 4x
6x + 4x = 20 + 2 + 12
10x = 34
x = 17/5
x = 3,4
\(6\left(x-2\right)+\left(-2\right)=20-4x\)
\(\Leftrightarrow20-4x-6x-12=-2\)
\(\Leftrightarrow-10x+8=-2\)
\(\Leftrightarrow-10x=6\)
\(\Leftrightarrow x=6:\left(-10\right)=-\frac{3}{5}\)
Vậy x = -3/5
\(6\left(x-2\right)+\left(-2\right)=20-4x\)
\(\Leftrightarrow6x-12+\left(-2\right)=20-4x\)
\(\Leftrightarrow-12+\left(-2\right)-20=-4x-6x\)
\(\Leftrightarrow-24=-10x\)
\(\Leftrightarrow x=\frac{12}{5}\)
Trả lời:
6.(x - 2) + (-2) = 20 - 4x
=> 6x - 12 + (-2) = 20 - 4x
=> 6x - 14 = 20 - 4x
=> 6x + 4x = 20 + 14
=> 10x = 34
=> x = 3,4
Vậy x = 3,4
