Question

1) 2+9х=4х+3
2) (9^-4)^2 / 9^-10

Answer 1

1) 2+9x=4x+3
    9x-4x=3-2
    5x=1
    x=1/5
    x= 0.2
2) $(9^{-4})^2$ / $9^{-10}$ =
  = $9^{-8}$ / $9^{-10}$ =
= $9^{-8-(-10)}$ =
= $9^{2}$ = 81