1)-1/3х=3
х=3/(-1/3)=-9
2)х=-38/(-3.8)=0.1
3)х=-3+7=4
4)у=0.5-3.5= -3
5)z = 0-(-6)=6
6)z/5= -7-3= -10
z= -10×5= -50
7)a= -2.8-2.8= -5.6
8)n= -4.4+1.4= -3
9)x+3=12/2=6
x=6-3=3
10)2(1-y)= -8-3= -11
1-y= -11/2= -5.5
y= 1-(-5.5)=6.5
11)8x-3x=12+8
5x=20
x=4
12) 0.8y-0.4y= -1.2-2.8
0.4y= -4
y= -10
13) 5x-7=2x+32
5x-2x=32+7
3x=39
x=13
И так далее. Мне лень.