Question

determine a raiz de :
B)-2x+18=0 C)-9+81X=0

Answer 1

b) 
 - 2x + 18 = 0
- 2x = - 18 ( - 1)
2x = 18
x = 18/2
x = 9

c)

- 9 + 81x = 0
- 9 = - 81x ( - 1)
9 = 81 x
81x = 9 (:9)
9x = 1
x = 1
      9