[tex]3x - 10 = 25 + x + 15[/tex]
[tex]3x - 10 = (x) + (25) + (15)[/tex]
[tex]3x - 10 = x + 40[/tex]
[tex]2x - 10 = x + 40 - x[/tex]
[tex]2x - 10 = 40[/tex]
[tex]2x = 40 + 10[/tex]
[tex]2x = 50[/tex]
[tex]x = \frac{50}{2} [/tex]
[tex]x = 25[/tex]
[tex]∴ \: the \: value \: of \: x \: = 25[/tex]
