Răspuns:
x=0 x=1 x=-7 x=-20 x=0
Explicație pas cu pas:
1) 2x+2=-7x-21+9x-15-5
2x-2x=-43
0x=-43
x=0
2) -9x-3+14=21x-9-10
-30x=-30
x=1
3) 14+2*(3-2x+6)/2=37
14+2*(9-2x)/2-37=0
14+9-2x-37=0
-2x=14
x=-7
4) -4-6-6-5-x-7+9-1=0
-x=20
x=-20
5) 5+2x+2=-7x-21+9x-15+43
0x=7-7
0x=0
