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6x-8-2x+5=12+3x
6x-2x-3x=12+8-5
x=15/1
x=15
tylko to pierwsze bo drugiego nie wiem z dzieleniem xd
[6x-8]-[2x-5]=12+3x
6x-8-2x+5=12+3x
6x-2x-3x=12+8-5
x=15
b)2x-3-[3x+2 to podzielone przez 3] = 4+2x
2x-3-[x + 2/3]=4+2x
2x-3-x-2/3=4+2x
2x-x-2x=4+2/3+3
-x=7 2/3
x= -7,(6)7=-7 2/3
6x-4-2x-5=12+3x/-3x
3x-4-2x-5=12/+5
1x-4=17/+4
x=21
2x-3-[(3x+2):3] = 4+2x
2x-3-[1x+⅔]=4+2x/-2x
-3-[1x+⅔]=4/+3
-[1x+⅔]=7/-⅔
-x=6(i dwie trzecie)