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5x=9-2
5x=7 /:5
x=1 i 2/7
j) 1/3(-3x+6)=27
-1x+2=27
-1x=27-2
-1x=25 /: -1
x=-25
k) (12x-24):4=27
12x-24:4=27
12x-6=27
12x=27+6
12x=33 /:12
x=2 i 9/12
l) -4(2x-3)= -12
-8x-12= -12
-20x=-12 /: -20
x= 1 i 8/20
ł) (x-1)-(2x-2)=4
x-1-2x-2=4
x-2x=4+1+2
-2x=7 /: -2
x= -3 i 1/2