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102=2x!:2
51= x
43=7+9x!-7
36=9X!:9
4=X
17=11-12x!-11
6=-12x!:-12
0,5=x
3⅔=½x-⅓!-⅓
3⅓=½x!×2
6⅔=x
-27=x+72!-72
-99=x
x+5,4=-4,5!+4,5
x=0,9
2,5×x=100!:2,5
x=40
⅓x=3½!×3
x=10½
2x+5=4x!-2x
5=2x!:2
2,5=x
1-5x=-9!-1
5x=-10!:-5
x=2
₂. 20 : 5 = 4 ;] 5 × 4 = 20
₃. 10 : 5 = 2 ;] 5 × 2 = 10
₄. 40 : 5 = 8 ;] 5 × 8 = 40
₅. 50 : 5 = 10;] 5 × 10 = 50
₆. 15 : 5 = 3 ;] 5 × 3 = 15
₇. 25 : 5 = 5 ;] 5 × 5 = 25
₈. 35 : 5 = 7 ;] 5 × 7 = 35
₉. 45 : 5 = 9 ;] 5 × 9 = 45
₁₀.222 : 2 = 111 ;] 111 × 2 = 222
₁₁.242 : 2 = 121 ;] 121 × 2 = 242
₁₂.825 : 25 = 33 ;] 33 × 25 = 825
₁₃.100 : 10 = 10 ;] 10 × 10 = 100
₁₄.888 : 8 = 111 ;] 111 × 8 = 888
₁₅.750 : 50 = 15 ;] 50 × 15 = 750
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W poleceniu nie pisze jakie mają to być działania więc nie powinnaś uznawać tej odpowiedzi jako błędnej...