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-x*(1 - 6x) = 2x *(3x - 1)
-x+6x² = 6x² - 2x
-x = -2x
2x -x = 0
x = 0
z.2
[3 + x]/[5 + x] = 2/3
3*[3 + x] = 2*[5 + x]
9 + 3x = 10 + 2x
3x - 2x = 10 - 9
x = 1
-x - 6x²=6x²-2x
x=0
nie wiem czy to dobrze ;D