Himpunan penyelesaian sistem persamaan 4x+5y=-62 3x-2z=-15 4y+z=-37 Adalahh....

4x+5y=-62
3x-2z=-15
4y+z=-37 ➡ z = -37 - 4y

3x-2z = -15
3x-2(-37-4y) = -15
3x+74+8y = -15
3x+8y = -89

4x+5y = -62 [×3] 12x+15y = -186
3x+8y = -89 [×4] 12x+32y = -356
—————————————————— –
-17y = 170
y = -10

4x+5y = -62
4x+5(-10) = -62
4x-50 = -62
4x = -12
x = -3

3x-2z =-15
3(-3)-2z = -15
-9-2z = -15
-2z = -6
z = 3