[tex][(a + 260 \div 2) \times 3 + 4] \times 5 = 2000[/tex]
[tex](a + 130) \times 3 + 4 = 2000 \div 5[/tex]
[tex](a + 130) \times 3 + 4 = 400[/tex]
[tex](a + 130) \times 3 = 400 - 4[/tex]
[tex](a + 130) \times 3 = 396[/tex]
[tex]a + 130 = 396 \div 3[/tex]
[tex]a + 130 = 132[/tex]
[tex]a = 132 - 130[/tex]
[tex]a = 2[/tex]
