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2x +6=1=
2x=4
x=2
b)3(1-x)+2=-7
3-3x+2=-7
-3x=-12
x=4
c)3(x+3)=2(x+4)+x+1
3x+9=2x+8+x+1
0x=0
musiałeś chyba źle cos podać
d)4(3x+2)+5(2x+3)=-(2x+13)
12x+ 8+10x+15=-2x-13
24x=-10
x= -10/24
e)4(x-2)-2(x-4)=5(x+1)-3x
4x-8-2x+8=5x+5 -3x
0x=5