Question

Resolva 20×-30-49=40+30-20

Answer 1

20x - 30 - 49 = 40 + 30 - 20
> 20x = 40 + 30 - 20 + 30 + 49
> 20x = (40 + 30 + 30 + 49) - 20
> 20x =  149 - 20
> 20x = 129
> x = 129 / 20
> x = 6,45

Answer 2

20x-30-49 = 40+ 30 - 20
20x - 79 = 70- 20
20x - 79 = 50
20x = 50 + 79
20x = 129
x = 129/20
X = 6,45