Zadanie
x + 6 = 16 l -6
x = 10
x - 7 = 11 l +7
x = 18
5x = -35 l :5
x = -7
-7x = -35 l :(-7)
x = 5
[tex]4x=-25\ \ \ \mid:4\\\\x=-\frac{25}{4}\\\\x=-6\frac{1}{4}[/tex]
5x + 7 = 17 l -7
5x = 10 l :5
x = 2
2x - 9 = -15 l +9
2x = -6 l :2
x = -3
5x + 4x = 81
9x = 81 l :9
x = 9
6x - 2x = 16
4x = 16 l :4
x = 4
