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-4x - x^2 + 3 = 7x - x^2 + 5x - 45
-4x + 3 = 12x - 45
- 4x - 12x = -3 - 45
- 16x = -48 | (-16)
x = 3
5x-3(x+1)=2x-3
5x - 3x - 3 = 2x - 3
2x - 3 = 2x - 3
0 = 0
^2 - oznacza do potęgi drugiej
-4x-2x+3=7x-2x+5x-45
-4x-2x-7x+2x-5x=-45-3
-16x=-48
x=3
5x-3(x+1)=2x-3
5x-3x-3=2x-3
5x-3x-2x=-3+3
0=0
-4x-x²+3=7x-x²+5x-45
-4x-x²-7x+x²-5x=-45-3
-16x=-48/*(-1)
16x=48/:16
x=3
5x-3(x+1)=2x-3
5x - 3x - 3 = 2x - 3
5x-3x-2x=-3+3
0=0