11x+3y+7=0. 2x+5y-21=0..metode gabungan eliminasi subtitusi
Matematika
kustianaalma
Pertanyaan
11x+3y+7=0. 2x+5y-21=0..metode gabungan eliminasi subtitusi
1 Jawaban
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1. Jawaban syd2h1g
Eliminasi
11x+3y+7=0 -> 11x+3y=-7 | x5
2x+5y-21=0 -> 2x+5y=21 | x3
55x+15y=-35
6x+15y=63
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49x = -98
x = 2
Subtitusi x=2 ke 2x+5y-21=0
2(2)+5y=21
5y= 21-4 = 17
Y= 3.4