Jika 12x+5= 9x-10, maka nilai x-4 adalah? Tolong dibantu besok di kumpulin

12x + 5 = 9x - 10
12x - 9x = - 10 - 5
3x = -15
x = -5

x - 4 = -5 - 4 = -9

[tex]12x + 5 = 9x - 10 \\ 12x - 9x = - 10 - 5 \\ 3x = - 15 \\ x = \frac{ - 15}{3} \\ x = - 5[/tex]
[tex]x - 4 \\ - 5 - 4 \\ - 9[/tex]