Tentukan Hp dari a.(3(x+2)-2(y+3)=8 (5(x+2)+3(y+3)=45
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Pertanyaan
Tentukan Hp dari a.(3(x+2)-2(y+3)=8 (5(x+2)+3(y+3)=45
1 Jawaban
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1. Jawaban RexyGamaliel
3(x+2) - 2(y+3) = 8
3x + 6 - 2y - 6 = 8
3x - 2y = 8 ... (i)
5(x+2) + 3(y+3) = 45
5x + 10 + 3y + 9 = 45
5x + 3y + 19 = 45
5x + 3y = 26 ... (ii)
Eliminasi kedua persamaan
*pers. (i) dikali 3 , pers. (ii) dikali 2 *
9x - 6y = 24
10x + 6y = 52
__________ +
19x = 78
x = 4,1
Substitusi x ke pers. (1)
3x - 2y = 8
3(4,1) - 2y = 8
12,3 - 2y = 8
-2y = -4,3
y = 2,15
Jadi, x = 4,1 ; y = 2,15