diketahui x-3y-5=9 dan 2x-3y =9 nilai dari 3x+2y adalah

¶x - 3y - 5 = 9
x - 3y = 14

Maka
x - 3y = 14
2x - 3y = 9
...................... -
-x = 5
x = - 5

Nilai y :

2x - 3y = 9
2(-5) - 3y = 9
-10 - 3y = 9
-3y = 19
y = -(19/3)

Maka :
= 3x + 2y
= 3(-5) + 2(-19/3)
= -15 - 38/3
= (-45 - 38)3
= -(83/3)