3x +5y=5 dan x+2y =7
Matematika
fatiyah8
Pertanyaan
3x +5y=5 dan x+2y =7
2 Jawaban
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1. Jawaban BSunShine
3x + 5y = 5.... ×1
x + 2y = 7 .... ×3
•••••••••••••••••••
3x + 5y = 5
3x + 6y = 21
••••••••••••••••••• (-)
-y = -16
y = 16
x + 2y = 7
x + 2(16) = 7
x = 7 - 32
x = -25 -
2. Jawaban Nik001
x + 2y = 7
x = -2y + 7
3x + 5y = 5
3(-2y + 7) + 5y = 5
-6y + 21 + 5y = 5
-y = 5 - 21
-y = -16
y = 16
x + 2y = 7
x + 2(16) = 7
x + 32 = 7
x = 7 - 32
x = -25
HP = { -25, 16 }