Answer:
[tex]x = \frac{ - 19}{3} [/tex]
Step-by-step explanation:
[tex]( - 5x + 5) + ( - 7x + 9) = 90[/tex]
[tex] = > 5 - 5x - 7x + 9 = 90[/tex]
[tex] = > 14 - 12x = 90[/tex]
[tex] = > - 12x = 90 - 14[/tex]
[tex] = > - 12x = 76[/tex]
[tex] = > x = \frac{76}{ - 12} = \frac{ - 19}{3} [/tex]
