Odpowiedź:
a)
[tex]6 +4(3-k) = 3(-2k +9)\\6 + 12 - 4k = -6k + 27\\18 - 4k = -6k +27\\2k = 9\\k = \frac{9}{2} \\k = 4,5[/tex]
b)
[tex]9(m +2)+1 = 19+8m\\9m + 18 + 1 = 19 + 8m\\9m + 19 = 19 + 8m\\m = 0[/tex]
c)
[tex]4 - (8 + 2n) = 3(n +2)\\4 - 8 - 2n = 3n + 6\\-4 - 2n = 3n + 6\\- 5n = 10 // : (-5)\\n = - 2[/tex]
d)
[tex]3 - 2x = 1 - (-2 + x)\\3 - 2x = 1 + 2 - x\\-x = 0\\x = 0[/tex]
e)
[tex]7 = 3(y + 2) +4(y - 1)\\7 = 3y + 6 + 4y - 4\\5 = 7y\\y = \frac{5}{7}[/tex]
f)
[tex]0 = 2z - 5(4 +0,2z)\\0 = 2z - 20 - z\\20 = z[/tex]
