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2x - 3[x - 4x - 1] = x + 1
2x - 3(- 3x - 1) = x + 1
2x + 9x + 3 = x + 1
10x = 1 - 3
10x = -2
x = - 2/10 = - 1/5
b)⅔(3x-1)-1½[2x+3(x-2)]= 1
2/3 (3x - 1) - 3/2[ 2x + 3x - 6] = 1 mnożymy całość przez 6
4(3x - 1) - 9(5x - 6) = 6
12x - 4 - 45x + 54 = 6
- 33x = 6 - 54 + 4
- 33x = - 44
x =44/33 =4/3 = 1 i 1/3