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Pilihlah Menjadi Jawaban Terbaik Terimakasih
4x-5y = -34
3x +4y = -10 ( semua kali 5 )
4x-5y = -34 ( semua dikalikan 4 )
15x + 20y = -50
16x - 20y = -136
31x = - 186
x =
x = -6
3x + 4y = -10
3(-6) + 4y = -10
-18 + 4y = -10
4y = 8
y = 2
8x + 3y = ....
8(-6) + 3(2)
-48 + 6
8x + 3y = -42
Jadi 8x + 3y adalah -42