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LeraPie
@LeraPie
August 2022
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Решите систему уравнений методом подстановки x+5y=36
8x-7y=6
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Санечка69
Verified answer
x + 5y = 36, х = 36 - 5у, х = 36 - 5
· 6 = 6,
8x - 7y = 6; 8(36 - 5у) - 7у = 6; у = 6.
Решим 2-е уравнение:
8(36 - 5у) - 7у = 6,
288 - 40 у - 7у = 6,
288 - 47у = 6,
-47у = 6 - 288,
-47у = -282,
у = 6.
Ответ: (6; 6).
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Answers & Comments
Verified answer
x + 5y = 36, х = 36 - 5у, х = 36 - 5 · 6 = 6,8x - 7y = 6; 8(36 - 5у) - 7у = 6; у = 6.
Решим 2-е уравнение:
8(36 - 5у) - 7у = 6,
288 - 40 у - 7у = 6,
288 - 47у = 6,
-47у = 6 - 288,
-47у = -282,
у = 6.
Ответ: (6; 6).