Answer:
[tex]x = - 23[/tex]
Step-by-step explanation:
[tex] \frac{20 - (40 + x)}{12} \times 10 = 32.5 - 30 = 2.5[/tex]
[tex] = > \frac{20 - (40 + x)}{12} = 0.25[/tex]
[tex] = > \frac{20 - (40 + x)}{12} = \frac{1}{4} [/tex]
[tex] = > 20 - (40 + x) = \frac{12}{4} = 3[/tex]
[tex] = > 40 + x = 20 - 3 = 17[/tex]
[tex] = > x = 17 - 40 = - 23[/tex]
