1) 7^{x-12}=49^{x-18}
7^(x - 12) = 7^2(x - 18)
x - 12 = 2(x - 18)
x - 12 = 2x -36
x = 24
2) (1/6)^{x-6}=6^{x-16}
6^(-x +6) = 6^(x -16)
-x +6 = x - 16
2x = 22
x = 11
3) 13^{2-x}=(1/13)^{5x-8}
13 ^ (2 - х) = 13^(-5х +8)
2 - x = -5x +8
4x = 6
x = 1,5
1) 7^{x-12}=49^{x-18}
7^(x - 12) = 7^2(x - 18)
x - 12 = 2(x - 18)
x - 12 = 2x -36
x = 24
2) (1/6)^{x-6}=6^{x-16}
6^(-x +6) = 6^(x -16)
-x +6 = x - 16
2x = 22
x = 11
3) 13^{2-x}=(1/13)^{5x-8}
13 ^ (2 - х) = 13^(-5х +8)
2 - x = -5x +8
4x = 6
x = 1,5