Question

help me pls dau coroana

Answer 1

-2x-x=3-4

-3x=-7|:(-3)

x= 7/3

Answer 2

$\it -2x+4=x-3\ \Rightarrow\ 4+3=x+2x\ \Rightarrow\ 7=3x|_{:3}\ \Rightarrow\ x=\dfrac{7}{3}=2\dfrac{1}{3}$