(8/9)^x * (3/4)^x=16/81 Find Domain and Solve! (5/9)^5x-9=(9/5)^9x-5 Find Domain and Solve! (0.4)^2x-3=(6.25)^4x-3 Find Domain and solve!?

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(8/9)^x * (3/4)^x = 16/81
(2/3)^x = 16/81
x = 4

(5/9)^(5x -9) = (9/5)^(9x-5)
(9/5)^(9 - 5x) = (9/5)^(9x -5)
9 - 5x = 9x - 5
x = 1

0.4^(2x-3) = 6.25^(4x-3)
(2/5)^(2x-3) = (5^2/ 2^2)^(4x-3)
(5/2)^(3-2x) = (5/2)^(8x-6)
3 - 2x = 8x -6
9 = 10x
x = 0.9...Show more