Question

Equação primeiro Grau resolva 20(5x+10x-10x)+80=0

Answer 1

100x + 200x -200x +80 = 0

100x + 80 = 0

100x= -80

x= -80/100

x= -0,8 ou - 4/5

Answer 2

20(5x + 10x - 10x) + 80 = 0
20.(5x) + 80 = 0
100x + 80 = 0
100x = - 80  (:10)
10x = - 8
x = - 8 (:2) = - 4
      10 (:2)      5