diketahui sistem persamaan linear 3x + y = -10 dan 2x + 3y = -16. nilai 3x -2t adalah

9x+3y=-30
2x+3y=-16
__________ - ( eliminasi )
7x = -14
x = -2

9(-2)+3y= -30
-18+3y = -30
3y = -12
y = 4

3(-2)-2(4) = -6-8
= -14

3x+y=-10 |2| 6x+2y=-20
2x+3y=-16 |3| 6×+9y=-48
-7y=-28
Y=4
2x+3(4)=-16
2x+12=-16
2x=-16-12
2×=-28
X=-14

3(-14)-2(4)
-42-8 = -50