A/ X + 3 = 15 B/ 9 + X = 15 C/ X – 14 = 37 D/ 89 – X = 67 E/ X + 39 =...

Bài 7: Câu 3: Tìm x :

a/ x + 3 = 15

b/ 9 + x = 15

c/ x – 14 = 37 d/ 89 – x = 67

e/ x + 39 = 60

f/ 48 + x = 65

g/ x – 34 = 29 h/ 73 – x = 45