Question

Tìm x :

2x + 100 = -20 - 20 + 50

Answer 1

2x + 100 = -20 - 20 + 50

2x + 100 = 10

2x = 10 - 100

2x = -90

x = -45

Vậy \(x=-45\)

Answer 2

2x + 100 = -20 - 20 + 50

2x + 100 = -40 + 50

2x + 100 = 10

2x = 10 - 100

2x = -90

x = - 45

Vậy : x = -45

Answer 3

2x + 100 = - 20 - 20 + 50

2x + 100 = - 40 + 50

2x +100 = 10

2x = 10 - 100

2x = - 90

x = ( - 90 ) : 2

x = - 45

Vậy x = - 45 thỏa mãn đề bài