tìm x \(\in\)N
1, \(x^2.x^3=3^7:3^2\)
2, \(x-18:3=12\)
3,\(\left(x-18\right):2=12\)
4,\(x^2=16\)
5,\(\left(2x+2^4\right).5^3\)
6,\(\left(3x-48\right).6=3^3.2^2+2^2.3^2=12^2\)
7,\(1170:\left(x-13\right)=339-3.10^2\)
8,\(\left(x-1\right).11=33\)
9,\(3.\left(x-9\right)+15=12+243:3^2\)
10,\(30:\left(x-7\right)=15^9:15^8\)