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evdokiyaabaeva
@evdokiyaabaeva
July 2022
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Решите систему уравнений :
3x+5y=12
x-2y=-7
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Answers & Comments
KarinaYouchi
3x+5y=12
x-2y=-7 x=-7+2y
3(-7+2y)+5y=12
-21+6y+5y=12
11y=33
y=3
x-2*3=-7
x=-7+6
x=-1
Ответ:(-1;3)
3 votes
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Answers & Comments
x-2y=-7 x=-7+2y
3(-7+2y)+5y=12
-21+6y+5y=12
11y=33
y=3
x-2*3=-7
x=-7+6
x=-1
Ответ:(-1;3)