Question

 giúp mik câu 2 f mik cần gấp 

 

Answer 1

Câu 2

a) (-105) + x = -217

x = -217 + 105

x = -112

b) x - 67 = -23

x = -23 + 67

x = 44

c) 4(3 - x) = 28

3 - x = 28 : 4

3 - x = 7

x = 3 - 7

x = -4

d) 5[x + (-81)] = 400

x - 81 = 400 : 5

x - 81 = 80

x = 80 + 81

x = 161

e) 140 : (x + 108) = 7

x + 108 = 140 : 7

x + 108 = 20

x = 20 - 108

x = -88

f) -27 + (-x) = -104

-27 - x = -104

x = -27 - (-104)

x = 77