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BABYSTORM
@BABYSTORM
July 2022
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Решите систему уравнений,пожалуйста(система на фото)
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Dимасuk
Verified answer
-13x + 12y = 35
-7,5y - 6 1/2x = -12
-13x + 12y = 35
-7,5y - 6,5x = -12 |·(-2)
-13x + 12y = 35
13x + 15y =24
Сложим и получим:
12y + 15y = 35 + 24
27y = 59
y = 59/27
-13x + 12y = 35
y = 59/27
-13x + 236/9 = 35
y = 59/27
-13x = 35 - 236/9
y = 59/27
-13x = 315/9 - 236/9
y = 59/27
-13x = -79/9
y = 59/27
x = -79/117
Ответ: (-79/117; 59/27).
0 votes
Thanks 1
sedinalana
Verified answer
{-13x+12y=35
{-7,5y-6,5x=-12⇒15y+13x=24
прибавим
27y=59
y=59/27
13x+15*59/27=24
13x=24-885/27
13x=-237/27
x=-237/27:13
x=-237/351
x=-79/117
0 votes
Thanks 0
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Answers & Comments
Verified answer
-13x + 12y = 35-7,5y - 6 1/2x = -12
-13x + 12y = 35
-7,5y - 6,5x = -12 |·(-2)
-13x + 12y = 35
13x + 15y =24
Сложим и получим:
12y + 15y = 35 + 24
27y = 59
y = 59/27
-13x + 12y = 35
y = 59/27
-13x + 236/9 = 35
y = 59/27
-13x = 35 - 236/9
y = 59/27
-13x = 315/9 - 236/9
y = 59/27
-13x = -79/9
y = 59/27
x = -79/117
Ответ: (-79/117; 59/27).
Verified answer
{-13x+12y=35{-7,5y-6,5x=-12⇒15y+13x=24
прибавим
27y=59
y=59/27
13x+15*59/27=24
13x=24-885/27
13x=-237/27
x=-237/27:13
x=-237/351
x=-79/117