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Решите систему постановки: {x+2y=6 {2x+y=9

Ответ:

кВіТкА9876565446

08.10.2020 14:07

{x=6-2y
{2x+y=9
2(6-2y)+y=9
12-4y+y=9
12-3y=9
3y=3
y=1
x=6-2×1=4
ответ:1;4

0,0(0 оценок)

Ответ:

Бозя1

08.10.2020 14:07

{x+2y=6
{2x+y=9

{x=6-2y
{2(6-2y)+y=9

Решим ур-е:
2(6-2y)+y=9
12-4y+y=9
12-3y=9
-3y=-3
y=3
x+2*3=6
x+6=6
x=0

0,0(0 оценок)

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