Cara mengerjakn sistem persamaan dua varuabel 5P+q=10 14p+3q=18

5P + Q = 10 (x3)
14P + 3Q = 18 (x1)

15P + 3Q = 30
14P + 3Q = 18
--------------------- _
P = 12

lalu dimasukkan >>
5P + Q = 10
5(12) + Q = 10
60 + Q = 10
Q = -50

5p+q = 10(x3)
14p+ 3q= 18

eleminasi q
15p+3q= 30
14p+3q= 18
___________-
p= 12

subtitusi
5p+q= 10
5(12)+q= 10
60+q= 10
q= 10-60
q= -50