Question

calcule 4x – 20.2x + 64 =0

Answer 1

4x - 20.2x + 64 = 0
4x - 40x = - 64
-36x  = - 64 
x = $\frac{-64}{-36}$ 
x = $\frac{16}{9}$

Answer 2

4x – 20.2x + 64 =0

4x -40x +64 = 0

-34 x = -64 . (-1)

34x = 64

x= 64/34 (simplificamos por 2)

x= 8/17