Zadanie 3
a) 2x + 5 = 12 + x |-5
2x = 7 + x |-x
x = 7
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b) 6 - 3x + 2 = 2[tex]\frac{1}{2}[/tex] (x+1)
8 - 3x = 2[tex]\frac{1}{2}[/tex]x + 2[tex]\frac{1}{2}[/tex] |-2[tex]\frac{1}{2}[/tex]
5[tex]\frac{1}{2}[/tex] - 3x = 2[tex]\frac{1}{2}[/tex]x |-2[tex]\frac{1}{2}[/tex]x
5[tex]\frac{1}{2}[/tex] - 5[tex]\frac{1}{2}[/tex]x = 1 |:5[tex]\frac{1}{2}[/tex]
x = 1
Zadanie 4
a) 5x - 5 + 10x + 80 - 4x + 2 =0
11x + 77 = 0 |-77
11x = -77 |:11
x = -7
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b) 3 ⋅ 5 ⋅ [tex]\frac{x-3}{5}[/tex] = 3 ⋅ 5 ⋅ [tex]\frac{x-5}{3}[/tex]
3x - 9 = 5x - 25 |+9
3x = 5x - 16 |-5x
x = 8
Mam nadzieję, że pomogłem
Liczę na naj <3
