Question

[Pham Trong Bach]

Tìm x:

X + 6 = 12

14 + x = 21

9 + x = 61

Answer 1

[Cao Minh Tâm]

X + 6 = 12

X = 12 − 6

X = 6

14 + x = 31

X = 31 − 14

X = 17

9 + x = 61

X = 61 − 9

X = 52