Poziom B:
a)
[tex]\frac{x + 1}{2} + x = \frac{x + 2}{3} | * 6\\ 3x + 3 +6x = 2x +4\\9x +3 = 2x +4\\7x = 1\\x = \frac{1}{7}[/tex]
b)
[tex]\frac{2(x + 1) -3}{4} = \frac{x}{5} | * 20\\10x + 10 - 15 = 4x\\10x - 5 = 4x\\6x = 5 | : 6\\x =\frac{5}{6} \\[/tex]
c)
[tex]\frac{8 - x}{2} + \frac{5 + x}{4} = 12(1 - \frac{x}{48} ) | * 4\\ 16 - 2x + 5 +x = 48 - x\\21 = 48 \\[/tex]
Równanie sprzeczne
d)
[tex]\frac{x + 4}{2} - 5 = -3| * 2\\ x + 4 - 10 = -6\\x - 6 = -6\\x = 0[/tex]