Ad dua soal lagi nih....hehe maaf ya. 1. 7x - 3y= 8 jika y=2 2. 5y + x=15 jika y=-1 Pke cara ya....

1)7x-3y=8
7x-3(2)=8
7x-6=8
x=8+7+6
x=21
2)5y+x=15
5(-1)+x=15
4+x=15
x=15-4
x=11

1. jwb
7x - 3.2 = 8
7x - 6 = 8
7x = 8 + 6
7x= 14
x = 14/7
x = 2
jadi, 7.2 - 3.2 = 8
14 - 6 = 8

2. jwb:
5.-1 + x = 15
-5 + x = 15
x = 15 + 5
x = 20
jadi, 5.-1 + 20 = 15
-5 + 20 = 15


tolong jadikan jawaban terbaik ಥ_ಥ