ta có

36 + x = 99

x        = 99 - 36

x        = 63

\(\frac{x}{3}=\frac{y+1}{4}=\frac{x-y-1}{3-4}=\frac{0-1}{-1}=\frac{-1}{-1}=1\)

=> x = 1.3 = 3

y + 1 = 1.4 = 4 => y = 4 - 1 = 3

=> x² + y² = 3² + 3² = 18

Nam and Khoa have :9+4=13( pencils) bạn tích cho mình nhé ; )

1, because he has an umbrella

2,ozone

chắc vây rồi 

Find ONE mistake. (Tìm lỗi trong những câu sau.)

No one (A) is more happy (B) than children when (C) Tet holiday comes. (D)

A. No one 

B. more happy 

C. when 

D. comes