Question

Tìm x , biết

5 - ( 1 - 3x ) = 2x +4

Mình đg cần gấp  Giup mình với

Answer 1

5-(1-3x)=2x+4

5-1+3x=2x+4

5-1-4   =2x-3x

0       = x  (2-3)

0       =  x.(-1)

(-1) \(\ne\)      0 =>x=0

Answer 2

\(5-\left(1-3\chi\right)=2\chi+4\)

\(\Rightarrow5-1+3\chi=2\chi+4\)

\(\Rightarrow4-4=2\chi-3\chi\)

\(\Rightarrow0\ne-\chi\Leftrightarrow\chi\in\varnothing\)

SUN

Answer 3

\(5-\left(1-3x\right)=2x+4\)

\(\Leftrightarrow5-x+3x=2x+4\)

\(\Leftrightarrow5-4=2x-3x+x\)

\(\Leftrightarrow1=0x\left(vô-lí\right)\)