bantu jawab pleasee,,, dari tadi nyari nggak ketemu jawabannya heheh^^

(2)^x-2y+1 = (2)^4
=> x-2y+1 = 4
=> x-2y = 3 ............ (1)

(3)^2x+y-3 = (3^4)^x-y
=>(3)^2x+y-3 = (3)^4x-4y
=>2x+y-3 = 4x-4y
=>2x-5y = -3 .............(2)

dari pers (1) dan (2) diperoleh
x-2y = 3 |x2| 2x-4y = 6
2x-5y = -3 |x1| 2x-5y = -3
__________ -
y = 9

y = 9, subtitusi ke pers (1)

x-2(9) = 3
x - 18 = 3
x = 21

jadi, jawabannya a. x=21, y=9