1) x-1=-4 ? x= -4+1= - 3
2)x+2=-1 ?x= -1 -2 = -3
3)x-5=-5 ?x=-5+5=0
4)2x=-20 ?x=-20/2= - 10
5)-4x=24 ?x=24/(-4)= - 6
6)-13x=-156 ?x= - 156/(-13)= 12
7)-2x+1=7 ?x=(7-1)/(-2)=6/(-2)= - 3
8)3x-2=10 ?x=(10+2)/3=12/3=49)40x+7=15 ?x=(15-7)/40=8/40=1/5=0,2
10)-3x+6=-9 ? x= (-9-6)/(-3)=-15/(-3)=5
11)4x-3=6x-8 ? 8-3=6x-4x ?2x=5?x=5/2=2,5
12) 4(x-3)=6x-2 => 4x-12=6x-2=> 4x-6x=12-2=> -2x= 10=> x= -5