4 ^ ( x + y ) = 128
5 ^ ( 3x - 2y - 3 ) = 1
---------------------------
( 2 ^ 2 ) ^ ( x + y ) = 2 ^ 7
5 ^ ( 3x - 2y - 3 ) = 5 ^ 0
------------------------------
2( x + y ) = 7
3x - 2y - 3 = 0
----------------------------------
2x + 2y = 7
2y = 7 - 2x
y = 3,5 - x
-------------------------------------
3x - 7 + 2x - 3 = 0
5x = 10
x = 2
y = 3,5 - 2 = 1,5
Ответ ( 2 ; 1,5 )