Tìm x, biết a) x + (−35) = 27. b) (−42) − x = −10. c) x − (−50) = 16

1. Ta có x + (−35) = 27

suy ra x = 27 − (−35)

x = 27 + 35

x = 62.

2. Ta có: (−42) − x = −10

suy ra x = (−42) − (−10)

x = −42 + 10

x = −32.

3. Ta có:

x − (−50) = 16

suy ra x = 16 + (−50)

x = −34.