Question

resolva as equacoes:

Answer 1

c) 0,8 x = V 16/25
    8x/10 = 4/5                 mmc 10,5 = 10
    8x = 8
      x = 8/8
      x = 1

d) 3^x³ + x  = 9
    3x³ + x = 3²         corta-se as bases iguais
    x³ + x = 2
    x³ + x -2 = 0

    

Answer 2

a) $4^{x}=8$
$2^{2}^{x} = 2^{3}$
$2x=3$
$x= \frac{3}{2}$

b) $2^{3}^{x+1} =2^{5}$
$3 (x+1) = 5$
$3x+3=5$
$3x =2$
$x= \frac{2}{3}$