Răspuns:
Explicație pas cu pas:
a) 5x-2=2x+7
5x-2x=7+2
3x=9
x=9:3
x=3
b) 3x+5=4x-8
4x-3x=5+8
x=13
c) 6-2x=-7x+21
-2x+7x=21-6
5x=15
x=15:5
d) -4x+5=4x-27
4x+4x=5+27
8x=32
x=32:8
x=4
e) -2x+5=-3x+4
-2x+3x=4-5
x=-1
f) -8-14x=2x-8
2x+14x=-8+8
16x=0
x=0
