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linakim2001
@linakim2001
October 2021
1
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срочно надо
помогите пож )))!!!
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ann1885
№2система 15х-4у=8
у=1+3х
15х-4(1+3х)=8
15х-4-12х=8
3х=12
х=12/3=4
у=1+3*4=13
ответ (4;13)
№3система 6х-9у=9
6х+4у=48
-9у-4у=9-48
-13у=-39
у=39/13=3
2х-9=3
2х=12
х=12/2=6
ответ(6;3)
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Answers & Comments
у=1+3х
15х-4(1+3х)=8
15х-4-12х=8
3х=12
х=12/3=4
у=1+3*4=13
ответ (4;13)
№3система 6х-9у=9
6х+4у=48
-9у-4у=9-48
-13у=-39
у=39/13=3
2х-9=3
2х=12
х=12/2=6
ответ(6;3)