5-4x-14x=-10x+20x
4x-14x+10x-20x=5
x=5
=
3×(2x-7)=5x-(2x-4)
6x-21=5x-2x+4
6x-21=3x+4
6x-3x=4+21
3x=25
x=25:3
x=8,3
5-4x-14x=-10x+20x
4x-14x+10x-20x=5
x=5
=
3×(2x-7)=5x-(2x-4)
6x-21=5x-2x+4
6x-21=3x+4
6x-3x=4+21
3x=25
x=25:3
x=8,3