[tex][x \times ( - 2) + ( - 25)] \div ( - 5) = 3[/tex]
[tex]( - 2x - 25) \div ( - 5) = 3[/tex]
[tex] - 2x - 25 = 3 \times ( - 5)[/tex]
[tex] - 2x - 25 = - 15 \: | \times ( - 1)[/tex]
[tex]2x + 25 = 15[/tex]
[tex]2x = 15 - 25[/tex]
[tex]2x = - 10 \: | \div 2[/tex]
[tex]x = - 5 \: \in \: \mathbb{Z}[/tex]