1) 2^(4-2x) = 64 2) 2^(1-3x) = 16 3) 2^(2-x) = 16
2^(4-2x) = 2^6 2^(1-3x) = 2^4 2^(2-x) = 2^4
4-2x = 6 1 - 3x = 4 2 - x = 4
-2x = 2 -3x = 3 -x = 2
x = - 1 x = - 1 x = - 2
4) 4^(1-2x) = 64 5) 5^(x-7) = 1/125 6) 3^(x-18) = 1/9 7) 6^(4x-10) =1/36
4^(1-2x) = 4³ 5^(x-7) = 5^(-3) 3^(x-18) = 3^(-2) 6^(4x-10) = 6^(-2)
1 - 2x = 3 x - 7 = - 3 x - 18 = - 2 4x - 10 = - 2
- 2x = 2 x = 4 x = 16 4x = 8
x = - 1 x = 2