Odpowiedź:
1.
[tex]3 \times ( - 2) - 5 = - 6 - 5 = - 11[/tex]
2.A
[tex]15x - 12[/tex]
2.B
[tex]7x - 8 + 10x = 17x - 8[/tex]
3.A
[tex]5x = 24 - 12 \\ 5x = 12 \\ x = \frac{12}{5} = 2 \frac{2}{5} [/tex]
3.B
[tex]10x - 4x = 13 + 5 \\ 6x = 18 \\ x = 3[/tex]
4.
[tex]x + 7x = 48[/tex]
