4x+5dan2x-5 3x-8danx+5 2x-1dan×-12

4x+5=2x-5
4x-2x=-5 -5
2x =-10

3x-8 = x+5
3x-x=8+5
2x = 13

2x-1 =x-12
2x-x= 1-12
x = -11

maaf kalau salah

4x+5 dan 2x-5
=4x+5 + 2x-5
=4x+2x+5-5
=6x

3x-8 dan x+5
=3x-8 + x+5
=3x+x+5-8
=4x-3

2x-1 dan x-12
=2x-1 + x-12
=2x+x-1-12
=3x-13

semoga membantuya..