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4x+4-x=5
3x+4=5
3x=1
x= 1/3
b) 4-3x=-5
-3x=-9
-x=-3
x=3
c) -3(x+1)-x=0
równanie sprzeczne ( 0 rozwiązań)
d) 3(x+2)+2x=4
3x+6+2x=4
5x+6=4
5x=-2
x=- 2/5
e) x-7-2(3x+5)=3
x-7-6x-10=3
5x-17=3
5x=20
x=4
f) 4x-5-2(x+3)= -4
4x-5-2x-6= -4
2x-11= -4
2x=7
x= 3,5