Tanin

Tamin

Thamin

Thanin

2x+7y = 10

x-5y = 5

คำตอบคือ

x = 5

y = 2

10! - 3! - 4! = 3628770

$$2^{14\le}25^3$$   

$$-5^4\ge3^5$$  

128

129

130

131