Tolong nomer 16 yaa Makasih

jawab

1/2 x + 2/3 y = 1 ---> kalikan 6
3x+ 4y = 6 ....(i)

1/6 x - 1/3 y = 5/2 ---> kalikan 6
x - 2y = 15 ...(ii)

(i) dan (ii)
3x + 4y = 6 
x - 2y = 15...kalikan 2

3x + 4y = 6
2x - 4y = 30 .....(+)
5x =  36
x = 36/5

x - 2y = 15
36/5 - 2y = 15
2y = 36/5 - 15
2y = -39/5
y = - 39/10

nilai 2x + 3y = 2(36/5) + 3(-39/10)
= 72/5 - 117/10
= 27/5