[tex](x-5)^{2}[/tex]=[tex]x^{2}[/tex]+10
[tex]x^{2}[/tex]+25=[tex]x^{2}[/tex]+10
25[tex]\neq[/tex]10
D. Nie ma takiej liczby
1. 2x-3y+5=3x-2y
-x+y=-5 ------ F
2. 3x+7=x+1+2x
3x+7=3x+1
7[tex]\neq \\[/tex]1 ----- F
3. 2(x-3)+3(2-3x)=0
2x-6+6-9x=0
-7x=0 ------ P
4. 6x-3-x=3-6+5x
5x-3=5x-3
5x=5x ------ F, bo ma nieskonczenie wiele
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[tex](x-5)^{2}[/tex]=[tex]x^{2}[/tex]+10
[tex]x^{2}[/tex]+25=[tex]x^{2}[/tex]+10
25[tex]\neq[/tex]10
D. Nie ma takiej liczby
1. 2x-3y+5=3x-2y
-x+y=-5 ------ F
2. 3x+7=x+1+2x
3x+7=3x+1
7[tex]\neq \\[/tex]1 ----- F
3. 2(x-3)+3(2-3x)=0
2x-6+6-9x=0
-7x=0 ------ P
4. 6x-3-x=3-6+5x
5x-3=5x-3
5x=5x ------ F, bo ma nieskonczenie wiele