Odpowiedź :
1) 2x - 1 = 4x + 2
2x - 4x = 2 + 1
-2x = 3 /:(-2)
x = -1,5
2) 2(x+3) = 12 + x
2x + 6 = 12 + x
2x - x = 12 - 6
x = 6
3) -7(x-4) = 10 + (x-2)
-7x + 28 = 10 + x - 2
-7x - x = 10 - 2 - 28
-8x = -20 /:(-8)
x = 2,5
4) -3x - (2x + 1) = -2x + 2
-3x - 2x - 1 = -2x + 2
-3x - 2x + 2x = 2 + 1
-3x = 3 /:(-3)
x = -1
5) 2(x+1) + 6 = 4(2-3x) - 4
2x + 2 + 6 = 8 + 12x - 4
2x - 12x = 8 - 4 - 2 - 6
-10x = 4 - 2 - 6
-10x = 2 - 6
-10x = -4 /:(-10)
x = 2/5
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